Earlier quoted context omitted.
Oh its a lot more sinister than that, and its already here. An app I tried to run on my Android phone would run a video ad before it started, it used the front facing camera to determine if someone was looking at the phone. I looked away and started typing on my laptop and the ad paused, I looked back and it restarted, I looked away and the ad paused. I looked back and deleted the App.
This is why I don't use Android. On iOS, you install the app and at some point you see a prompt "This app would like access to your camera. Allow?" and you can click "Don't Allow" and keep using everything else. Versus Android, which at install time asks "This app wants access to these 37 different things. Allow everything and install, or would you prefer to kindly fuck off?"
In any case, the app would probably say "Oh, I can't have camera? Well you can't have app."
And it's not like you weren't warned on the page with "37 permissions".