It seems as though Apple’s hard at work in placing pieces of their cloud technology on already existing devices, enabling users to sync new music, apps, or iBooks purchased on the iBookstore or an iDevice to be wirelessly synced to any other iDevice logged in with the same Apple ID.
The feature is simple to enable – To enable this, go in to the settings in iOS, click the “store” tab, and now, in addition to seeing which account you have linked to the device, you can also turn on auto-syncing of music, apps, or books you download from the iTunes store.
The new feature does not require an update of either the iTunes store or the iOS software.