You must have used some really terrible touchscreen GPSes.
There's a big difference between what is safe and convenient when you are sitting at your desk, lazily poking at the screen, and what is acceptable when you are barrelling down the highway, with the screen you need to stretch your arm to reach.
On my wife's Sonata, e.g., sure, you can switch the screen between map, nav. entry, radio, etc. with physical buttons. But after that it's all touch screen.Thank God they at least left alone knobs for the climate control...
Sat in the eTron lately while waiting for service. Two Nice, bright screens with haptic feedback. Very much fun, as long as I was playing with it on a showroom floor. But I shudder to think of actually trying to use on the road.