My opinion: It's an impressive, well executed project, but probably not easily adaptable to a great commercial venture in it's present form.
With several generations of refinement and simplification, I can see this concept evolving into a faster, more versatile, safer craft... ending up with what's currently recognized as a race board. If you look at the timeline of the branch of performance sailboats that evolved into sailboards and then kiteboards, this craft looks like it belongs somewhere in the middle of that evolution, not at the end, or beyond it.
Therefore, also considering that sit-ski type boards are already fairly well suited to paraplegic kiteboarding, I think the best direction for your concept is not to compete with inherently simpler, faster alternatives like race boards, but rather to create a safer, albeit lower performance alternative that allows more than one person to ride together, with minimal training. In other words, a simple kite boat... which might also act as a stepping stone for those who wish to advance to kiteboarding.
Cheers,
James