Microsoft has announced that they will be shutting down the servers that authenticate music purchased through MSN Music or related services, which means anyone with media purchased from those outlets is screwed if they ever want to move said media to a new computer, or upgrade the computer’s OS. This, by the way, is MS’s famed “PlaysForSure” music store.
This is what happens with DRM every. single. time. You don’t own the music. They do. And at the end of the day, they don’t care about you.