Xbox has officially announced Xbox Music tonight which begins rolling out to Xbox consoles on October 16th. Starting on October 26th, Xbox Music will deliver free streaming music on Windows 8 and Windows RT PCs and tablets.
Microsoft states that Xbox Music has a catalog that is on par with iTunes and will give you access to millions of songs and albums that you can subscribe to or purchase through their online store. You can also purchase an Xbox Music Pass for $9.99/month to give you access to ad-free, unlimited playback of any song in their catalog.
Check out this press release with all the details