Sony Starts Publishing Switch Games and The Tale of Two Sonys

Sony is starting to play nice? For the past few months Sony has been isolating themselves from their competition. Both Nintendo and Microsoft announcing cross-play multiplayer gaming. It seemed Sony wanted nothing to do with either Microsoft and Nintendo. That is until Sony Music Entertainment announced they were launching inde project aimed at the PS4, PC, and the Nintendo Switch? What does Sony Music Entertainment's (SME) role in this industry, how does this effect the PlayStation brand. Most importantly, how does this effect the relationship between Sony Interactive Entertainment (SIE) and Sony Music Entertainment?