I don't know much about wind turbines and the behaviour of moving volumes of air with regard to airfoils but there's one point I picked off of the article.

If I were to put my money either in the most advanced big-farm wind high-tech or in something that is decentralized, mass-produced, and well-abused by all kinds of groups of people, it would be the latter.

The article mentions that one billion is not enough to enter the game. That surely excludes a lot of the smartest and brightest people who might come up with new innovations and the billion-scale investments also seek conservative returns, further culling new ideas.