This means that both you and your roommate can link separate Spotify credentials and nickname 'em to keep things tidy -- all while getting at your personal repository of playlists. The feature was available in beta form for the last month, but now its making an official debut.
Both versions also received a boost in the search department to make finding what you're after across all of those music libraries easier. Android users can expect lock-screen controls too, and if you splurged for a Playbar, the update packs in those audio improvements that were part of the beta as well.