Good. There is no way to use a touchscreen effectively while going 80km/h.
It would have to be the smartest touch screen ever, and be able to make assumptions as to what i'm trying to press -- fudge a lot of precision -- and even then I wouldn't know if what I'm touching and what the machine thinks I'm touching are correct without taking my eyes off the road. Meanwhile, I can feel for the 3rd knob or 3rd button and be sure what it is without taking my eyeballs off of the bumper of the car in front of me.
It would have to be the smartest touch screen ever, and be able to make assumptions as to what i'm trying to press -- fudge a lot of precision -- and even then I wouldn't know if what I'm touching and what the machine thinks I'm touching are correct without taking my eyes off the road. Meanwhile, I can feel for the 3rd knob or 3rd button and be sure what it is without taking my eyeballs off of the bumper of the car in front of me.