Valve recently announced that they're adding a music player to Steam OS and Big Picture mode. It will eventually make its way into the normal desktop overlay.
Here's a FAQ about it:
http://steamcommunity.com/groups/ste...73168504761775
It's pretty basic (only supports MP3), and I probably won't use it much. What's interesting about this though is that Valve did not state that they would not sell non-gaming-related music in the future. Valve recently started selling non-gaming software, but do you think they'll do it again with music?
IMO it's a little late to jump on the bandwagon, since streaming is so huge now. But whatever, it would be another place to buy music. I'd use it as long as I can use it however I want outside of Steam like I can with Amazon and iTunes (after installing Quicktime for the latter).
So, are you here for Valve ha music player?