I'll never buy a car that doesn't allow me to turn on the air conditioning without taking my eyes off the road. In other words, physical buttons and dials that are always in the same place. Something I can feel with my fingers and always rely on being there.
Touchscreen controls sure are flashy, but as far as I'm concerned when employed in a multi-ton piece of machinery traveling at 60+mph they're borderline homicidal. I know I'm not the only one who thinks this way.
I'm open to voice controls. I don't like speaking to machines, but having machines speak to me is something I appreciate (for instance I always have my GPS talk to me, I never look at the screen) and I could see myself coming around on talking to machines. But a big old glorified ipad stuck in the dash? No way.