OK I am putting this in “news” because it is “news” that people are “talking” about this concept again.
Heronemus, the “father of wind energy” invented this general concept. He called it “Windship”. It’s basically a wall of wind turbines, mounted on floats. (Heronemus’ first patent references my first wind energy patent as prior art.)
Another “press-release breakthrough”. Will it ever be built? I don’t see any reason why not, except the history of such structures entails problems with structural oscillations. One big red flag though is the name: “Windcatch” and various versions thereof (“Windcatcher”) are symptomatic of newbie-esque “talking point” turbines that are never built or never work out. But I do think it addresses the cube-square laws and the size of rotating parts, except it does not eliminate the square/cube law but merely shifts the cube-square law to the supporting structure. I wonder how long it might take to re-aim in shifting winds…