Well, it's not yet fully on the market. But it exists and works and (we hope) will be on the market soon. The AeroQuad -- a personal flyer that stays in the air for 5 hours and flies at a comfortable height of 20-30 feet. Might not be ideal for NYC and other cities lined with tall buildings. On the other hand, if Batman and Spiderman can sail through the concrete caverns of Gotham, why can't we...who are stuck commuting there and to other congested cities.