Yea. Who knows maybe we will eventually have vehicles like in the movie I, Robot
My friend had a good idea for cars to drive itself, it would souly depend on GPS. However, I think that would have been flawed because unless the cars around you had GPS, you couldn't detect them. So you would defintely need sensors for the road and cars.
I'd like to see those "self driving cars" go one of those 16 lane highways down in Texas.