In 2014 wind power produced the equivalent of 39% of Denmarks total electricity consumption ,from offshore wind farms like the Middelgrunden wind farm just outside Copenhagen
https://en.m.wikipedia.org/wiki/Wind_power_in_Denmark
I think thats wonderful, really. But it would be very hard to make it happen here. In a statist society such as the US, the government would get in the way of just about every non-connected attempt at alternative energy, via permitting and other regulations, while awarding contracts and subsidies to crony operations. We also have a lot of coal, oil and gas available, and those industries don't like to get messed with. If I'm remembering correctly, Denmark had very little if any petrochemical resources. ANY alternative power would get embraced if it meant furthering the Danish independence streak. While I'm not a fan of labor unions, and interventionist economics of any kind, I respect how seriously property rights and free trade are protected in your country. It doesn't work that way here.
Another thing to consider: Denmark has a tiny population compared to other developed nations, equivalent in the US to the state of Wisconsin. There are more people living in NYC here, and I doubt that wind power could take care of the needs of that whole city, much less the nation. Again, I think it would be better to have small installations of wind power in remote locations, rural areas and such, to eliminate the losses from transmission and keep control of the power in local hands. There are still better ways -like the nuclear methods I mentioned - but it makes a great supplementary system.