I hope they're not Li-Ion
crossed my mind, most probably, the required energy storage density and dynamic performance no doubt gets you into tricky technology..
(great spelling
)
Carrying a significant load seems challlenging, I guess it mainly is a technology demonstrator.
If it is agile & can do 500 km/ hr & land on very small places, maybe defense, e.g escorting bigger helicopters. No doubt too expensive for wide commercial use.
I can imagine it being very quiet hovering (electric, ducted fans) and very noisy in forward flight (wing wake hitting the fans), like those fancy Piaggio's..
