A New Spotify Initiative Makes the Big Record Labels Nervous

That jump seems harder to make with music, since artists don't typically sign exclusive distribution deals the way TV producers do (popular songs get played on every radio station, TV shows stick to one network at a time) so being a distributor doesn't give as much of a competitive advantage. Additionally, the article indicates that the big music labels prohibit Spotify, and probably other distributors, from getting too competitive with them.

On the other hand, Microsoft really wants people to pay more attention to the Xbox's multimedia capabilities and is probably less fettered by such agreements. I could see them pushing exclusive content as a strategic move, perhaps spinning off some IP from their games division.