Also anticipated but not introduced: subscription-based music access
UPDATE: It’s also important to note that while Amazon and Google let users stream their cloud-based music to their devices, Apple will offer downloads for music it stores via iTunes Match. Meaning once you’ve moved it down from the cloud to your device, you don’t have to worry about having a live Web connection to listen to it again. The flip side of this is that on some devices, users may run into a storage issue, because Apple isn’t offering users the ability to stream the music. On the third hand, if all or most of your stuff is in the cloud, storage shouldn’t matter that much, anyway.
What about other features that music industry observers (like myself) had expected to see–like the ability to share music with friends, or any kind of social tie-ins? Nope. Also MIA: Any kind of improved recommendation/discovery engine. In Jobs’ world, music is still something you own, and listen to, by yourself.