The discussion I stumbled upon, about this SSH app for Android, is really worrying. Will Google really manage to make it impossible to root your phone?
But there's more to this, it's more complicated. In the Big Picture, Google has every incentive to make these changes — they lead to more security, and they're aligned with Google's corporate goals as well.
When talking to users, Google will emphasize control over hackers.
When talking to stockholders, Google will emphasize control over users.
Edit: I disagree with "they lead to more security". That's not "security", let's not turn words upside-down.