Microsoft just announced Background Music coming later this summer.
Additionally, a new club community feature will be added to the Xbox, allowing you to find new players and make friends playing the games you play. This is also going to be coupled with a new “Looking for group” option, allowing you to seek out players for specific purposes. Think 360 beacons, only more robust.
Finally, A new Xbox Arena area will be introduced in order to organize and execute tournaments online. One of their first partners is EA Sports.