In 2019, US consumers will, for the first time, spend more time per day using their mobile devices than watching TV
Context & Ripple Effects
This crossover has been building for four years: Flurry reported back in September 2015 that time inside mobile apps had already passed TV time in the US, but that was an app-level comparison. eMarketer's 2019 projection is the broader claim — total daily time on the device itself overtaking television for the first time.
The intervening coverage explains how the gap closed: Nielsen found US adults averaging nearly six hours of daily video across screens in 2018 (Nielsen's cross-screen study), and YouTube alone was carrying 37% of all mobile internet traffic by March 2019, versus Facebook's 8.4% (YouTube's share of mobile traffic). Mobile didn't just grow; it became the primary video pipe.
First-order effects
- Advertisers and their agencies get a new planning baseline: with mobile ahead of TV in daily minutes, budget allocation models built around TV-first reach have to be re-weighted toward mobile inventory this cycle.
- Measurement firms like eMarketer and Nielsen become the arbiters of the transition, since buyers will demand comparable cross-screen numbers before shifting dollars at scale.
Second-order effects
- Video-heavy platforms positioned for mobile — YouTube most visibly, given its dominant share of mobile traffic — capture a disproportionate slice of any ad dollars that move, pressuring TV networks to unbundle and repackage content for small screens.
- App economy suppliers benefit downstream: the same engagement curve later showed up in spending, with users putting $50B into mobile apps in H1 2020 alone (record H1 2020 app spend), giving developers and ad networks pricing leverage.
Third-order effects
- If the pattern holds, television's role structurally shifts from default screen to one surface among several, and industry structure follows attention: consolidation pressure on linear TV while mobile-native media companies absorb the audience and the ad market rebalances around them.
- Cross-screen measurement becomes the contested infrastructure layer — whoever defines a comparable 'minute' across TV, apps, and mobile web effectively sets how billions in advertising are priced.
The trend: US media consumption is completing its migration from the living-room set to the personal device, with each annual dataset confirming mobile as the center of both attention and ad dollars.