This horse is a superb example of the Akhal-Teke breed, “famous for those individuals who have a golden buckskin or palomino color with a distinctive metallic sheen.” (from Wikipedia).
I’ve seen a lot of discussion around various fora that debate whether or not this horse is real or digital or photoshopped, but it’s a genuine example – and a beautiful one – of an exotic breed.
More photos at Imgur.
The Old Wolf has spoken.
Playing in the World Game 
I’m sure the Akhal Teke is genuine. Like Weimeraners and some fancy mice they seem to have the “satin” gene which flattens individual hairs and gives their coats that special irridescence.