Bird deaths eliminated.
The sound of the turbine is mitigated by the tower wall.
Flickering shadows on the surrounding landscape are eliminated.
The heat-generating rotating parts of the turbine and generator are kept cool no matter how hot the weather.
The horizontal plane allows more efficient, longer lasting bearings to be used and creates less wear on those bearings.
The horizontal plane also eliminates gravity and wind load fluctuations, making blade construction lighter and cheaper.
Seawater contacting the inner, hard-to-clean surfaces of the device is too cold and salty to form algae, minimizing maintenance.
No chemicals to leak into the environment.
Produces power even when the air is still due to the reverse stack effect.
Now azimuth yaw mechanisms needed to keep turbine aligned.
Being at sea eliminates land purchase or rental or eminent domain takeovers.
Nutrient rich deep ocean water can be used for aquatic farming near the surface.
There is plenty of "fuel" since 90% of ocean water is between 32 and 37 degrees Fahrenheit and 40% of the world is tropical or subtropical.
Visit this blog to check out the stats that make it such a compelling idea.