Might works in certain regions, in others not (like middle Europe), despite heavily pushed. And windmills have a lot of environmental dangers.
In this calculation, only the power generation was counted. But what about the total costs to make this power including all the subsidies to push that technology and the fossile power plants to keep in reserve as backup in case no sun is shining and no wind?
So in summary "Big win" for the climate change lobby but not for the planet.