This goes against the entire idea of car PCs. I think it's hilarious when I see pics of interiors with GPS, Apexi controller and whatnot stuck to the top of the dash or hanging from the windshield. That's not cool, it's ghetto. Simply having displays in your car doesn't make your **** cool. Making it look like it came that way IS.
BTW: An I Pad in a car is LAME. Same with PSP, same with a laptop, same with an ITX board stuffed in your double din space behind a 7" display. People who do this stuff have no idea what automotive computing is all about.