They'll go back to DRM because they can make it so they have the only music store on many peoples' phones and tablets. No choice in vendor, helping insure they get their music from apple, then no choice in players so they must buy apple devices to listen to iTunes music. It's not a cornered market, but purposeful vendor lock-in isn't exactly unheard of.
1. So are they going to take away support for mp3 and aac files?
2. Are they going to make Spotify, Pandora, Rhapsody, Amazon Music, and Google Music, etc. take their apps of the store?
3. Are they going to remove mp3/aac support from Safari?
4. Are they going to remove all of their API's for streaming music?