I think it's becoming clearer that there's no strict dividing line between computer-driven and human-driven.

Rather, we'll slowly move to more and more being done by computer, and less and less done by the human (in this example- the computer taking over the motorway driving, and then handing over to you when its time to return to the normal roads).

This was also covered in the article about the Google car last week, which hands over to humans when it gets into a sticky/narrow situation.

Park assist is fairly common these days - which will steer your car into a parking space.