No thanks. A worldwide broadband connection would entail powerful broadband satellites something that isn't possible in this day and age. Ten years from now is no time at all.
Secondly, if everyone could from the same library "download within seconds" (i.e. it would be streaming because of copyrights and whatnot) it would mean we would have the lowest common denominator (by that time, propably 128kbps AAC) which isn't good enough.
Third, much of my audio isn't even music, but my own audio productions and recordings, and I certainly wouldn't want that to be on a public server. Even if I wanted, I couldn't, as the moment I sell a story, a documentary or just a piece, I don't own the rights to publish and distribute it as I wish anymore, although I do own the copyright.
I don't use google apps either. I like to be in control all the way.