This is NOT new. North actually produced a production 3D moulded windsurfing Slalom/Race sail over 10 years ago, maybe more. It was only available in one size from memory, (6.5m) it was very expensive and was a commercial flop.
Doesn't anyone else remember this?
Maybe they have worked out a much cheaper and more flexible way to do it now?
Another video of the current technology for Yacht sails: