For flatwater cruising as shown seems quite boring once got the hang of the equilibrium, but as a learning or assisting platform for other uses, may be.
Just brainstorming :
Some experience multi sport rider (Kai Lenny, C Baxter, Robby N...) should try in a downbreezer. Hopefully, the motor would only be needed to take off, once up, the runners and wind should do the rest. Even more interesting: in a downbreezer you could use the motor to assist you upwind in prone position, so no car shuttle hassle
Once with proper high wind downwinder conditions you don't need the motor. Put that same foil in a sup downwinding foil board (need to be lighter) and there you go, the balance and skills you learnt in milder conditions will have prepared you for the real thing
As I said, just brainstorming, does anyone see a problem in that idea? Any other crazy ideas?
by the way, I assume the jet for propulsion comes from the board tail (I see some sprinkler out of the tail, even airborne) but not sure. The don't show the foil but if the jet comes from the board tail it shoudn't be special besides having the right wing surface