RE: A real STARTBOARD LONGBOARD???
If the market for the SUP is surfers that also want to put a sail on their board, there may be a nitch for the board for those near an ocean.
As for the inland sailors - If people want to paddle, they buy a kayak. If they want to windsurf, no one will be selling them on an SUP.
Even if the prevailing wind conditions are light, few will be content with sailing in less than 10 knots for long. Almost all of us wanted to start planing as soon as possible in the beginning, impatiently waiting for enough wind.
When I recommend boards for beginners, it's almost always somethng like a GO. Easy for learning, durable and has the potential for excellent planing performance. If you only want to sail in 2-10 knots, the SUP may be a good choice. On the other hand, once a 4 or 5 year old masters the skills of bike riding with training wheels, how many are content to never take the training wheels off?
Somene dedicated to light wind freestyle may find the SUP intriguing.
It will be interesting to see who buys these things. If for some reason, the SUP somehow entices more people into the sport, that will be a good thing. Let's hope.