Whenever I think of that episode I wonder if computer-controlled cars would actually be safer!
For 50 years science fiction has been promising us that we would be able to commute to work in personal flying vehicles. The reason it hasn't happened isn't the difficulty of creating vehicles, it's the non-existence of air traffic control that could cope with them.
With cars it's different as there doesn't need to be a central controller, each one can do its own planning. Cars have intrinsic advantages over planes, they can't fall off the ground, and because they can use friction with the road, they can both stop and change direction quickly, unlike a plane.
Having said that, there something in the papers recently where a Chinese company has scaled up the kind of small drones that are being used as toys to carry one person up to 20 miles. You don't fly it, you use your ipad/phone to tell it where you want to go, and it takes you there completely automatically. I think something like this has potential to replace some bus/train journeys for some people. I guess air traffic control could cope with completely computer controlled vehicles flying routes that were logged and approved before take-off.