Last weekend I was in a Sonata trying to configure audio settings while driving down the road. I could not for the life of me press the right button since there was always just enough jostling on the road to move my finger the required few mm away. Then I had to deal with the same errors while trying to fix the previous mistake. It was really, really annoying, and I was the passenger! Can't imagine using that damn thing while driving.
I like touchscreens, but they have to be handheld like a phone. If you're asking me to stick a finger out to press something not in my grasp, it's like pin the tail on the donkey.
Not if you're using gestures it's not.
Last statement covers it. Having steering wheel keypads for important functions and shortcuts is a necessity, allowing the driver to access common functions without removing his/her hands from the wheel and taking their attention from the road.
Steering wheel keypads are not the only way to control a touchscreen system without taking your hands off the wheel... voice commands. Almost everyone in this thread is not properly thinking this issue through. You're not the only ones to blame, neither is google, or apple, or anyone else in this market.
In my car, if you want to navigate somewhere you simply say "Ok google, navigate to somewhere" and it will do so. Both hands on the wheel.
You can also tell the car to change volume, or change track, or load pandora, or kill pandora. But faster than that is to use
gestures to change track, or kill pandora.
Two fingers down on the screen gets you the next track. You don't have to take your eyes off the road, you don't have to hit a small target on the screen, and you don't have to feel anything. You just swipe two fingers down the screen anywhere on the screen... next track. Pause the music? Double tap... anywhere on the screen. No need to look.
Again I'll mention that because navigation is so absurdly easy to initiate, I navigate almost everywhere. Google knows where the traffic is, and it knows the fastest route around said traffic. I do keep the turn-by-turn voice bit off so that I can listen to music.
Also, it looks better than the car did initially:
Also, the display automatically dims the lights when the sun goes down based on your GPS location.