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I think "flying car" should be reframed as 'noisy expensive conventional personal aircraft'.

'Flying car' is associated with what you see in scifi movies, they never use conventional aircraft tech, they can lock in space, don't burn oil, don't sound like an high-pitched overblown fan, don't have wings, ... They are piggy-backing on this image without delivering the necessary innovations. Unless someone hacks gravity or improves energy density of batteries beyond today's dreams, "flying cars" will stay a scam, it won't happen. More likely to see everyone riding segways by 2020... With global warming, the idea of vast distribution of personal aircrafts integrated into daily lives is beyond absurd, IMHO.