When the streaming service launched, its "Connect" feature was supposed to be a one-to-millions social network for artists to share bits of music, photos and videos with their fans. But it never really took off so Apple more or less shelved the idea. Up Next looks like a sort of return to that, but instead of an artist sharing intimate moments from the studio with his or her audience, Apple is putting the spotlight on musicians that otherwise might fly under radar of the service's 20 million paid subscribers.