These guys are claiming 4 to 8 hours, 4,000 feet etc. http://www.uniteddrones.com/aether-aero/ Heck even 10 minutes flying and one day solar recharge would be awesome in an urban area for stealthy long term observation.

Hmmm...I must disagree:

http://robohub.org/video-throwing-and-catching-an-inverted-p...

It's fine if you don't find this amazing. I do, and I think many others do too.