Personally I foresee only a downside to this. As most know Apple, they like to limit all of their stuff down to only what they want their users to be capable off, unlike Samsung.
And knowing this trend, they will lock this into iTunes and/or Apple Music. Ie, shutting it out for Spotify users. As I’m a 100% Spotify user and never liked either iTunes nor Apple Music. Only used iTunes for iPhone related things.