if it is still touchscreen only there's not much way to improve it, you'll have to watch the pane of glass and not the road since there's no tactile information.
Tactile feedback from keyboards are also good, but that was traded off for the dynamic nature of a touchscreen. Regardless, I wasn't commenting on whether or not this is desirable, just that the tech exists, which it does.
I could see a hybrid, but voice only wouldn't work for those with speech issues. I realize you could make the same argument that touch is a problem, but touch is required as a means for control of the automobiles basic functions where as speech wouldn't be.
You should be able to say "car, turn up the air and the music down".