Ooh, now this is interesting. Microsoft has seemingly confirmed that all Xbox Live Gold members will be able to stream music from Xbox Music free of charge on Xbox One, though will have to listen to the odd advert occasionally à la Spotify.
UPDATE: Except that they got it totally wrong.
Xbox One architect Albert Penello confirmed the news on Twitter, replying to a curious fan.
@Artemis_Rojo yes. You don't have to subscribe, but you will get periodic Ads.
— Albert Penello (@albertpenello) November 4, 2013
Depending on how often the adverts occur (they currently kick in between every five songs), this could be a nifty little feature, and ties in nicely to Xbox One's 'all in one' design philosophy. DNLA, MP3, PlayTo and audio CD support have also recently been confirmed. Sony recently announced that their Music Unlimited service is the only way to listen to custom soundtracks on the PS4, lacking DNLA and audio CD functionality, though of course this will require a subscription. [via OXM]
UPDATE: Penello since admitted to making a mistake, and getting his wires crossed. "I was wrong about Music on XboxOne: You get 15 free song plays then need Music Pass for ad-free streaming," he tweeted. "No ad-supported streaming. Sorry!"
Shame. However, he was also keen to remind potential customers that PlayTo MP3 streaming is still supported.