[Zikes]

I'd really hate to have to have to say "increase driver side temperature by 2 degrees" when I could much more easily just turn a knob without looking, thanks to muscle memory & tactile feedback.

[jonknee]

Me too, but I change temperature so rarely that it being on a touch screen would not be an issue either.

[javajosh]

But, your car can take so many commands that one cannot make a physical knob for everything.