If it controls navigation, phone, radio/stereo and all the other crap that people currently look away from the road to do via HUD and voice commands, I don't see the problem.

Military jets and some cars already use heads-up displays precisely because they allow you to see data without taking your eyes off the road/sky.

People already screw with stuff while riding, and it kills a lot of people - mainly when they take their eyes off the road.