We're told that subscriptions, like the current Zune Music Pass offering, will be available alongside a free streaming service supported by ads — similar to Spotify. The service will be available on Windows Phone, Windows 8, and Xbox 360.
A key part of the service is Microsoft's SkyDrive integration that will allow users to store music and playlists in a cloud collection — available across multiple devices. Although Microsoft has plans to offer Xbox Music across multiple platforms, including iOS and Android, apps will not be immediately available we're told.
It will be interesting to see how good this works. But as a 360 and WP7 user, I'm pretty excited to check it out. It's another little bump that might get me to upgrade my iMac to a Windows 8 machine, too.