They should invent a way for individual people to fly around easily, like birds. Leaky roof? No problem, just fly up there and check it. Late to work? Just fly right up to your building; you wouldn't need a runway or anything. I think it would be cool to fly up and sit and get stoned on a tree branch too. I guess there would have to be some sort of air traffic control center (for people) and you would have to wear a device, maybe if you were travelling a certain mileage. Maybe just a simple, motorized propeller that you can wear on your head and on your ass, similar to a helicopter.