Not really usable for wind turbines though, the energy cost would be significant first of all (compare the blade area of a wind turbine to a plane!) The bigger issue is maintenance. Wind turbine leading edges are a very hostile environment compared to a plane and even normal materials get abraded very quickly, plus they are expected to last for many years without significant maintenance. Anti-ice systems would just not be economical if they had to be maintained to a working condition at all times.