To each is own... and you're not speaking for everyone, right?!?!
In case anyone else who is interested in using a iPhone as their car computer, I have a Eclipse AVN2210P (double din) installed in my car right now, I can play videos while I'm dring and I don't have any issues with the small touch screen. My iPhone screen is bigger then sceen that's on the AVN2210p. So the hands free laws and UI issues shouldn't be that big of a deal as people are making it out to be.