Until then, the snark seems unwarranted, though I agree that there's good reason to be concerned: they definitely have a lot of power here, despite not having seemed to abuse it yet. That seems like an interesting conversation to have, especially in a more substantive format.
As you can read here their response to the EU antitrust lawsuit http://techcrunch.com/2015/04/14/internal-google-memo-respon... google makes the argument that users spend a lot of time inside apps. I would expect they are worried about the ability for users to go directly to content and bypass search from which they make money.
I'm not sure which side of the fence I fall on. The web is arguably a more open technology than native apps but the experience in a native app is often better.
I think its more driven by the fact that more of Google search traffic comes from mobile, so its more critical that the results provide a good experience on mobile.
If people move away from web and toward Google's mobile properties, then they're probably pretty okay with that.