In fact, out of my large music library, I only have a couple thousand songs of my own uploaded. Out of a few hundred users, there are only 3 others who have uploaded a similar number of songs. My service allows you to share playlists with your friends and loads of users don't upload anything and are just dependent on playlists form their early adopter friends. If Apple gets the rights to skip out on having users upload it will be a huge win.
It also seems like Google and Amazon are in this space only for the sake of trying to get people on their respective Android platforms (in the case of Amazon up and coming) where as Apple at least has _some_ sense in organizing music nicely and creating a nice playback experience. The Amazon UI kinda makes me shudder as I always end up clicking on things by accident because there are too many links/buttons embedded in each row.