This is a clear infringement of our patented SailFan (TM) technology.
Invalid due to prior art:
But, like others, I don't consider it sailing, even if it is wind powered.
Well, some fundamentalists don't even accept the BMW-Oracle with the wing sail as a "sail boat". To me (and the North American Land Sailing Accociation seems to agree here) this rotor-yacht is still sailing, just with sails that move relative to the vechicle
We could have a wind-powered generator driving an electric motor. Would that count too?
No, if you convert kinetic energy into electrical energy and potentially even store it, NALSA would not accept this. But this vehicle uses wind energy directly to propel itself, just like any sail boat does. Comparison of a sail boat on a broad reach to this propeller:
I'd prefer to see efforts made toward improving windward performance.
If you change the gearing (e.g. wheel size or blade angle) this vehicle will go directly up wind. Potentially faster than the true wind. Both directions (down & up wind) are visualized here: