Don't forget heating and cooling too. There's a ton of things that are necessary to operate while the vehicle is in motion and should never be delegated to a touchscreen.
I'm fine with touchscreens for in car entertainment for the back seats and maybe a passenger one with the appropriate shutter technology to block the driver's view. None of those things are important for vehicle safety... but if there is a speaker that the passengers can control there needs to be a mute button for the driver to turn that shit off too :)