comScore: time spent online on desktop devices declined 9.3% in December, 7.6% in January, 2% in February, and 6% in March compared to the same period last year
Jack Marshall / Wall Street Journal : Tweets: @stevesi , @brianrose , @ia , @markham and @jackmarshall Tweets: Steven Sinofsky / @stevesi : Is US desktop Internet use in decline? http://www.wsj.com/... // Impossible to stay flat w/massive mobile growth. http://twitter.com/... Brian Rose / @brianrose : Meanwhile mobile usage online up 13% to 1 trillion min, or 2X time spent on desktops. Good trend for mobile VR. http://twitter.com/... iA Inc / @ia : “desktop Internet use might have peaked in 2015.” http://www.wsj.com/... http://twitter.com/... Markham Nolan / @markham : WSJ, May 2015: Mobile isn't killing desktop: http://blogs.wsj.com/... WSJ, Apr 2016: Desktop peaked in May 2015: http://www.wsj.com/... Jack Marshall / @jackmarshall : Desktop Internet use may have peaked in 2015 http://www.wsj.com/... via @WSJ http://twitter.com/...
Context & Ripple Effects
The May 2015 WSJ analysis framed mobile web traffic as additive to desktop, insisting desktop was "not in decline" — a year later, comScore's four consecutive months of year-over-year desktop erosion (9.3%, 7.6%, 2%, 6%) flip that argument. Steven Sinofsky's read is that staying flat was never possible against massive mobile growth, while Brian Rose pegs mobile at 1 trillion minutes, roughly double desktop time spent.
The significance is less the monthly percentages than who is measuring them: comScore's numbers are the benchmark ad buyers and publishers plan against, so a sustained negative desktop print forces a repricing of desktop inventory rather than a debate over it.
First-order effects
- Publishers and advertisers selling against desktop display inventory face shrinking measured reach every month through the December–March window, with comScore's data setting the price of that decline.
- Media plans calibrated to desktop audiences now undercount actual usage: Rose's figure puts mobile at roughly 2x desktop minutes, so the audience has moved even where total attention hasn't.
Second-order effects
- Budgets migrate toward mobile, where comScore later found 57% of US consumers' digital media time happening inside mobile apps — pushing publishers toward apps and platform distribution rather than the open desktop web.
- Measurement firms like comScore must rebuild their products around cross-platform and app metrics, since single-device desktop panels stop describing where attention actually sits.
Third-order effects
- If the pattern holds, the desktop web settles into a legacy channel while aggregate growth concentrates elsewhere — consistent with later reports of top-site traffic growth driven by mobile — and ad economics consolidate around whoever controls mobile distribution.
- The longer arc points to an app-and-platform-centric internet in which open-web time per visit keeps thinning even as commercial value per visit rises, echoing Adobe Analytics' later finding of falling per-visit time alongside higher per-visit spend (Adobe Analytics).
The trend: Desktop internet time peaked around 2015 and the industry is repricing itself around a mobile-first, increasingly app-mediated attention economy.