This is a nice concept. In populated areas there is quite a bit of pushback from the population to install wind turbines due to the distracting movement of the blades and their shadows. This idea solves that nicely by hiding the turbine. Maybe the marked for this is densely populated Europe?
I feel like this is worse though, as a tower like that looks million times worse than a wind turbine. I would hate if structures like that started appearing across the landscape.
We already have square structures in the landscape: office buildings. These could be put on top of regular buildings keeping the shape of the buildings, just making them a bit higher.
