Xbox 360 use to be able to stream my entire iTunes and other libraries. I believe you could even plug in a iPod and use that. Does Xbox One even do any of those? I know those sound like antiquated features with streaming and all, and i stopped using it ages ago on 360, but it was still a cool feature.
We've been asking about this above.
"Networked devices" (other computers on the network or devices plugged into the 360's USB port)
....Not available. Not sure if they will be added later, or....But as of right now, "background music" seems to be all about apps.
I really just want to stream my own music from my own Windows computer (server). Its so easy to do on the 360.