A bigger fan you could not find than me. Every time I find myself in traffic I fantasize about pulling back on the wheel and leaving it behind. But I don't believe this will EVER even come close to main stream. Perhaps a Saudi prince or 2 with disposable billions and more importantly the power to change his country's regulations just for him could be a buyer. But for the rest of us, never mind the buy in cost, government is NEVER going to let this happen. The regulations and approvals required will never converge. And cities will never allow the risk of people flying into and landing in a congested area.