Set a navigation app to close after a certain amount of time, for instance. If location triggers were added, would be nice to have those apps close by location and stop using GPS services once you got to some trigger point. And I'd like to tell apps that use location tracking in background to turn off if my battery is below say 40%. Or if there is a non-video media app that forces the screen to be on, and I'm not moving for let's say 10 minutes, turn off that app (or at least turn the screen off), because the only time I'd want the screen to be on that long is if I'm driving. Sometimes if I have a misbehaving app/mysterious battery drain, I will close all apps and restart the phone, and it would be nice to close all apps with one press instead of swiping one at a time.