The car I just got has bluetooth in it. I would think that it won't be long and all cars will have bluetooth available. It's dope.
For folks who don't know, I talk on the phone thru a mike in the car and hear the phone thru the radio speakers. My phonebook shows up on my radio screen, and when a call comes in the incoming phone number will show up on the radio screen as well. All the while my cell phone is in my pocket, or in the cupholder. Quite a nice feature, and probably a better safety feature than I give it credit for.