While I agree that distracted driving is dangerous and and I also expect that CA will make this illegal. I would love to have something like this to project speed and directions (think distance to next turn and direction) in my motorcycle helmet. The down side of some of these laws is that it's designed to nack people from doing stupid/dangerous things but also stop usage models for augmented reality that might actually make things easier/safer. How many drivers look at the GPS display on the center dash board? Is that safer them having it displayed on the windshield or google glass?