In kitesurfing there is quite a lot of interest in foils, as they are the best racing machines in the sub million dollar bracket. They also have a lot of light wind potential due to the efficiency of the foil.
With windsurfing, there may be this small sail appeal in that if you can get the foil going, you only need a small sail to keep it going. And there is the interest in having enough skill to gybe one on the foil. I still haven't seen a video of anyone doing that.
This shows the start of the sort of experimenting that needs to be completed before we get a high performance windfoil, but this was recorded about a year ago and maybe it didn't progress?