I think the problem is more the combination of "smart cars" and "dumb cars" on the road. The smart cars will be able to anticipate the actions of other smart cars, but when you add people in the mix it becomes unpredictable and that's where accidents will happen. And a "smart car" is only going to be able to avoid that unpredictable behavior some of the time.
We tend to look at science fiction and movies for our future ideas, but we only see the "final product" not the years of development and the problems associated with it. There's a long way to go before we can read while the car drives.
