CTV Won Everything Except the Money
Juggling 8+ platforms, justifying higher CPMs to linear-native clients, and unable to prove CTV drove a store visit?
If you’re buying television in 2026, you already know the audience moved. Streaming now accounts for 47% of all U.S. TV viewing according to Nielsen. That’s more than broadcast and cable combined. YouTube has led all platforms on television for three consecutive years. Netflix, at 8.8% of total viewing, has become a fixture in the monthly Gauge report rather than an anomaly. The directional shift has become a structural new reality.
So why have only 15% of TV buyers fully shifted their budgets to match?
It’s neither targeting nor creative, not even cost. The barriers they cite are transparency, fragmentation, and — above all — the inability to tie CTV exposure to real-world outcomes. CTV ad spend is projected not to surpass linear TV until 2028, when it’s expected to reach roughly $47 billion against traditional TV’s $45 billion. That’s a 3-year gap between where the audience went and where the money is willing to follow.
In a word: confidence.
The Store Visit Problem Blocking $47 Billion Ad Spend
CTV is no longer being positioned as a brand awareness channel. It’s being sold as full-funnel: a medium that can drive awareness, consideration, and conversion in a single impression. That’s the promise platforms are making to justify higher CPMs and larger budget allocations.
That's not full-funnel. That's half a funnel and a guess.
But nobody can deliver on that promise today. Full-funnel means proving what happened after the ad played all the way through to the purchase decision. And right now, the funnel breaks the moment someone leaves the couch.
CTV proves the ad played. Transaction data proves someone bought. But everything in between — did they show up, were they at the shelf, did the ad influence the purchase — is inferred, not proven.
That’s not full-funnel. That’s half a funnel and a guess.
This is the same structural gap this series has been mapping since we first examined the omnichannel presence problem, only now it’s blocking the largest budget migration in advertising history.
“Triangulate” Is Not a Measurement Strategy for Full-Funnel CTV Attribution
The industry’s current answer? Triangulation. Stitch together multiple signals and call the composite “measurement”: Geofencing, lift studies, data matching, panel-based modeling, clean rooms…
You’ve built these decks. You know how it goes. Five imperfect signals, none of which actually confirm someone was in the store, averaged and weighted and modeled until the slide looks defensible. It gets through the QBR. But you know (and your client’s CFO increasingly knows) that nobody in that room can point to the number and say this is real.
Because triangulation requires a presence signal to triangulate with. And that signal doesn’t exist in most retail environments today.
As we examined when we asked why “Trust Me, Bro” isn’t proof of presence, NielsenIQ’s Retail Media Mirage report revealed ROAS discrepancies as high as 35× between platform-reported figures and MMM-validated results. Those discrepancies don’t shrink just because the ad ran on a TV instead of an in-store screen.
And here’s what makes it worse: when the underlying data is wrong, you don’t just make bad decisions, but you lose the ability to learn from them. You can’t course-correct from a false foundation. That optimization cycle you’re running every quarter? If the attribution feeding it is flawed, you’re not iterating toward better performance. You’re iterating toward a more confident version of the wrong answer.
That’s not just a measurement gap. And it’s the reason $47 billion is sitting on the sideline.
The Standards for Verified Impressions Are Moving. The Technology Exists.
In December 2025, the Interactive Advertising Bureau (IAB) released “A Viable Framework for Maturing In-Store Media Measurement”, and it calls for exactly the signal the industry has been missing. The framework defines a verified impression using three foundational elements — the “Three Ps”:
- Play: The ad was actually rendered on the screen as planned.
- Presence: A shopper was physically present near the screen during playback.
- Pairing: Shopper presence was time-aligned with ad play.
This is a measurement standard that would make unverified impressions non-compliant. The IAB explicitly states that impressions should no longer be counted simply because content was scheduled or displayed. Verified impressions, grounded in real-world proof that exposure occurred, are the new floor.
Now map those three requirements onto the CTV-to-store loop:
Play. CTV handles this. The ad served, the impression was delivered, and completion rates are verifiable. This part works.
Presence. This is the gap. When the viewer walks into a store, CTV measurement goes dark. No signal confirms they arrived — let alone where they are inside the store. Geofencing approximates. Wi-Fi infers. Nothing verifies. And without real-time verification, there’s no opportunity to influence the purchase decision while it’s happening.
Pairing. Without verified presence, there’s nothing to pair. The time alignment between ad exposure and store visit remains modeled, not proven.
Two of three requirements are met. The one that isn’t — presence — is the one that unlocks the other two, gives advertisers the confidence to move budgets, and creates the opportunity to influence the purchase decision in real time.
LISNR Radius: Proof-of-Presence and Real-Time Influence
This is the gap LISNR’s Radius technology was built to close. And with Radius you close the measurement gap. Now you can complete the full-funnel promise that CTV is making but can’t deliver on its own.
Radius creates a deterministic, privacy-first signal that verifies a person is physically present — not just inside a building, but down to the aisle, the display, the shelf. Not probabilistically estimated, not inferred from a GPS ping three blocks wide, but ultrasonically confirmed.
Here’s how the chain closes for CTV:
- A viewer sees an ad on their connected TV.
- That exposure is verifiable through standard CTV measurement (the Play).
- The viewer drives to a retailer. Inside the store, in-store speakers emit inaudible ultrasonic tones. The shopper’s smartphone, through the retailer’s existing app, detects the signal.
- Presence is verified. Not modeled. Verified. A deterministic, first-party signal confirms: this person is physically here, right now.
- If a transaction occurs, the full loop closes: Play → Presence → Purchase. Every link in the chain is proven.
But here’s what makes this categorically different from every other measurement solution: because Radius verifies presence in real time, it doesn’t just prove the funnel. It completes it.
The customer who saw your CTV ad is now standing in front of your product. Radius confirms they’re there. Their loyalty app triggers a 10% off offer at the exact moment they’re making the purchase decision. That’s not measurement after the fact. That’s influence at the point of decision.
The sale happens at the register. But the decision happens at the shelf, the display, the counter. Radius is the first technology that can verify a person is at that moment, and act on it.
This is what makes the full-funnel promise real. CTV handles awareness. Radius handles proof and influence. Transaction data handles the close. No gaps, no guesses, no inference layered on inference that you have to defend in a room full of people who know better.
The $47 Billion CTV Budget Migration Starts Now
The CTV ad spend crossover is projected for 2028. That means $47 billion will be reallocated based on whoever can make the full-funnel promise real first. The brands, retailers, and RMNs that build verified presence into their CTV offerings now won’t just capture early-mover advantage — they’ll set the standards that everyone else will be forced to adopt.
Consider what’s at stake: by 2028, CTV ad spending will hit $46.89 billion and surpass traditional TV for the first time, according to EMARKETER. That crossover won’t reward the platforms with the lowest CPMs. It will reward whoever can prove the full funnel — from the screen to the store to the sale. If you’re pitching CTV to retail clients today, that proof is what separates you from every other agency in the room.
That growth depends entirely on advertiser confidence. And confidence depends on proof — deterministic, real-time, actionable proof. The next phase of CTV will be won by who can prove what happened after the screen went dark and can influence what happens next.
CTV promised full-funnel. With LISNR’s Radius, you can finally make it real.
This article is part of LISNR’s ongoing exploration of how deterministic presence verification is reshaping commerce and media measurement. For the full Proof of Presence thought leadership series, start with Your Omnichannel Promise Has a Presence Problem (Article 1), then read “Trust Me, Bro” Is Not Proof of Presence (Article 2), and Mind the Proof Gap (Article 3).
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