Comment Flying cars, no. Personal flight, probably not. (Score 1) 381
Personal flight is a game-changer. The powers that be don't really want it changed. It's not physics, engineering or fuel efficiency that's stopping it from happening - all those problems have already been solved. The only problem is people. Specifically, the people in charge. It doesn't matter how cheap this kit gets, or how safe and efficient, Joe Public will not be allowed to have one. Taxes and licences (and hardcore punishments for not having one...) will keep people earthbound, because no government on earth could cope with its people being given the freedom of the 3rd dimension. Borders and passports would become archaic reminders of a time when you used to have to ask permission from your government to be allowed to travel around. There would be diasporas from cities as people became able to live miles out of town, without the commute being an issue on narrow country roads.
Fully-functional personal flight devices - flying cars, if you like - already exist, and can cost no more than a luxury car (Gen H-4 for $60K), but the chances of you ever getting off the ground in one are slim. Red tape will keep them down much more effectively than gravity.