It depends on the definition of "near", but there's a sizeable population within ~40km, which is a reasonable distance for an offshore wind-farm.

Almost the entire Mediterranean is >500m depth within just a few km of the shore, and that's half a billion people. All of the eastern seaboard of the North+South American continent is available at 100km distance (another 100-200mn people). Most of west Africa, all of Australia, and almost all of the western flank of the Pacific.

Maybe a quarter of all people live within 40-50km of a 500m deep sea. Definitely a large TAM.