There's an old joke that says racing began as soon as the second car was built. It seems that the dream of a flying car hatched about five minutes after that, but we have yet to deliver. It's like that one thing that every kid puts on her Christmas list every year but never gets: a horse, a house in Disneyland, a visit from Dumbledore promising that she's a wizard and this isn't her real family. So please, Santa Claus, if we can have self-driving cars, can they have an option to fly? We'll be super good this year. We promise.