This is great. Now, we're just waiting for better batteries: stretching out 20 minutes of flight time across a day or even morning of skiing, kayaking, etc. is going to be difficult. I guess you can carry batteries with you.
I concur, you really need the possibility of multiple battery loads in order to get full value out of this stuff.
Can you do non-conductive power transmission at reasonable weights and efficiencies? I mean, my toothbrush does it, but I can't speak to the charging rate.
Wireless power transmission can only be implemented using alternating current through induction. Very hard to implement this in any meaningful way for battery powered digital devices.
