Yeah, that's why I suggested the one screen idea as an alternative to the two screens. Some people will want full immersion, but that's definitely a bad idea when you're on the move. Hence an ability to go one or two screens would be preferable. Of course, even if you included anti-idiot devices in the unit to keep people from driving and using one of these, they'd still do something idiotic anyways and wrap themselves around a tree, or someone else. Heck, they do it all the time with cell phones. Which means an anti-use law would likely go into effect for these too, which is fine IMHO. If you're driving, you pay 100% attention to what you're doing, period.