It has to release this year anyway. I know they have a console to promote but surely PC and Playstation can coexist just fine especially if Sony are truly willing to extend to PC with a platform of their own.
My personal guess is a new launcher + sub (PS Now with native play on PC, with some 1st party titles hence all the rumors about Bloodborne, God of War, The Last of Us, Days Gone etc..)
Bloodborne is being tested on Steam. I doubt there will be a new launcher unless Sony doesn't want their games to sell on PC.