ha! People (usually non-apple owners) bitch about "being tied to the Apple ecosystem", but this is the huge benefit of being deeply immersed in it.. Where iTunes purchases are essentially as portable as MP3. They'll play on every device in my house currently (ipads, iphones, apple tv, Mac/PC, etc)
I only recently bought an iPhone - had android or windows phone before (work supplied). If iTunes was a normal store they'd have an android app for playback. Anyway, for me buying discs and ripping is simple enough, and I'll migrate to digital purchases when they are more portable or prices drop