I think it's a promising product. Couple of things on "popularity". Nobody likes to add weights. How much extra weight does the bar imposes? What are your target demographic (obviously not low end bicycle market). Once you narrow down the size of market, it does get smaller rather rapidly at which point you need to find out how much you can produce in a batch in reasonable manner. I am guessing that $275 or something probably was doing basically one off on very small run production vs say 1000 in a batch probably can get it down to $25-$50 range depending on where you make it manufactured.
Here is a thought. I see good potential in high -mid end MTB, Hybrid. I actually see even more potential on a market where being adjustability and being able to do so on fly is godsend. Folding bicycle market. Lot of folding bikes are somewhat limited in bar selection or folded size due to it's need to fold. This could actually assist both in fit/folding side of story.
Good luck to you. (I would love to try but my folding bike doesn't have standard stem -_-)
Probably can be good money by contacting company like Dahon?