Decentralization for the web

> The main problem with flying cars is not that they're particularly hard, technologically
They _are_ hard. The currently existing "roadable aircraft" are just small airplanes with folding wings. They are about as fun to drive on roads as a VW Bug and about as comfortable. And of course, they still need a runway to fly or land.

To my knowledge, we don't have the technology to create a practical "flying car" - a vehicle capable of VTOL, carrying at least 4 passengers for at least a hundred kilometers. It looks like this might change once we get better lithium batteries (counter-intuitively, they have much better power-to-weight ratio than small engines)

> And given that we're still working on getting cars to drive themselves in 2D (on roads), achieving the same in 3D (so you won't need a pilot's licence) is still a ways off – it sort-of works for commercial airliners today but only if you can make fairly sure you have miles of empty airspace around you, which in a rush-hour setting wouldn't be all that helpful. Oh, and you still have to have two licensed pilots on board just in case.
Getting a pilot license is not that difficult - I have the required 20 flight hours with an instructor and solo and will pass the exam One Of These Days.

3D navigation is sufficiently easier - you don't have pedestrians or bicyclists up there in the air (barring a few unfortunate incidents).