You dont understand yes it is powered by a GPS but it had sensors on it to stop if to close to another car, person, or even a building. but the only problem i see is how a GPS sometimes takes the long way and adds a few more minutes to ur trip.
food maker? physically impossible and just is to lazy people will become fat and then wheres the fun in that. cars that drive themselves, accidents keep the population down, yes always tragic. Then food makers really that would cost to much money to just a simple meal.