I have a hard enough time getting multi-finger gestures to actually work on my iPad and that's while it is right in front of me with my full attention. I can't imagine this all happening while trying to drive the car too.

I think we have too much shit distracting us in the car as it is. I am more than happy with physical dials and sliders for A/C, dials and buttons for the audio, and hopefully someone will come up with a descent Siri-like voice command input for messages/voice and GPS.

Asking me to interact with a blank screen and having to look at it to make sure it's doing what I want is asking for trouble. Just the other day a cop was walking the line-up at the traffic lights and booking anyone who was fiddling with their phone.