> Car, well possibly provided it isn't for anything to do with the running or safety of the car.
It couldn't - drivetrain (all things to do with engine, steering and brakes) are on a different frequency on the car's network to infotainment, electric windows, aircon etc.
Yo're right, though: Apple's idea is to dock a phone and use it to power a display. Google's Android answer is to just embed an Android device in the car.
An analogy is Microsoft's "Make your phone a PC, your tablet is a laptop!" approach, whereas Apple use software to make the transition from phone to laptop more continuous.