There's been a few threads on this recently so apologies for adding another. The thing is - as with so many things in this day and age - I can't decide if I want it or need it.
Media player - I already have one
Discover new music - I'm already discovering more than I can listen to
The social bit - if I find good music I think friends will like I'm already telling them
My music collection, anywhere - this is the bit that intrigues me. Tell me more. How does it differ to iCloud? Is it just that you don't actually need any proprietary hardware/software, just a browser and some speakers?