A car is an portable electronic device. It may be powered by gas but that turns a generator which provides electricity. Many of the car components are electronic. Most cars are powered by a computer.
Also a speed limit sign is a bigger distraction than google glass ever could be and it requires you to take your eyes off the road to check to ensure that you are going the proper speed limit under penalty of law. Checking my speed got me in one accident when a driver in front came to a sudden stop far from a turn or intersection, and I was found at fault.
Distracted drivers will be distracted drivers even if you put blinders and ear muffs on them and lock their heads into position where they can only see the road.