I assume that video was shot in Tassie?

Seriously though, those boards have a longtitudinal blade instead of a fin. Could you apply the same to a conventional windsurfer? I have always fancied the idea of having a board that you could use in really shallow (and hence flat) water.
When I see the ease kids ride those skim boards with at the edge of the beach on nothing but a film of water, I imaging what a ride you could have on one with a bit of wind power - if you could overcome the lack of lateral resistance!