joker97:
The phone may know it's in a car, it may think it knows who its owner is, but it will never know who's driving, nor who's in possession of itself.
"Never" is a bit strong.
For example, you could include thumb-print sensors on the car start button (or steering wheel), plus a thumb-print sensor on the phone (as some already have). If the car/phone is in motion and thumb-prints are for the same person, then disable the phone. Unless it is mounted in the car, of course.
Whilst this really isn't viable at the moment (my Galaxy S6 thumb sensor is so unreliable, I normally unlock it by the pattern-swipe thing), I'd say it could be viable within 5-10 years.