[Billboard] The basic premise of Beats Music, which officially launched today, is that it’s the same as its many competitors‑‑see Spotify, Rhapsody, Slacker, Rdio, Sony Music Unlimited, Xbox Music, Muve, Google Music and, likely later this year, Deezer and YouTube– it’s a subscription service of a large on-demand catalog of music. But Beats operates like a cross […]