I think the most practical application of these will be the fact you can get absolutely shitfaced at the pub then just have your robot car drive you home.
>>2947 Imagine the hilarity if some pisshead sets his auto to drive to Land's End, and wakes up at 6am the next day and remembers he has to go to work.
Autonomous technology will almost certainly be introduced progressively as the technology develops. Many new cars (Volvos, Mercs, some VWs) are already equipped with assisted braking technology that will automatically apply the brakes to prevent a low-speed crash. The next step is probably intelligent cruise control that is capable of following a car in front or overtaking slower traffic, as motorways are a relatively controlled environment and so easier for software to navigate.