The more damning thing is the web is rapidly becoming poor people and geekland, with apps becoming where the middle and upper classes are consuming, so the value is moving heavily towards appland.
It's been clear for a while that monetising apps is easier than the web, though the discovery problem is intense.
What I've not seen, and would be interesting, is how different this is for iOS and Android users. i.e. do iOS users spend more time on apps vs in browser than Android users?