This video should relieve all doubt that very dense traffic is possible in the sky. As traffic in the air increases, more people could opt for computer controlled flight so that they don't have to concentrate hard on staying in the virtual VFR box on the highway in the sky.
A Swarm of Nano Quadrotors - YouTube
[url]http://www.youtube.com/watch?v=S-dkonAXOlQ
[/URL]
A Swarm of Nano Quadrotors - YouTube
[url]http://www.youtube.com/watch?v=S-dkonAXOlQ
[/URL]