We'd also love to see Apple bring the Up Next feature of iTunes 11 from the Mac to iOS. Other desktop features we'd like see on the iPhone and iPad include the capability to rename playlists; to sort playlists; and to add lyrics to tracks. (Speaking of which, wouldn't it be great if Apple could strike a deal with publishers so the Music app and iTunes on the desktop could automatically find and add lyrics?)
Finally, one minor interface request: The Show All Music toggle, which lets you decide whether the Music app shows all your music, local and iCloud-stored, or just the tracks that have been downloaded or synced to your device, can be really useful. In fact, we use this toggle switch frequently enough that we'd like easier access to it, right in the Music app.
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