Sony definitely made an announcement that is going to make a lot of fans happy after reading or hearing about this. Sony is planning to bring more games that were exclusive to PlayStation to PC. Days Gone is going to be one of the first games to be part of this transition.
I suppose Sony realized after so many years that they could actually sell more copies after a few years by adding the game to the list of games that can be bought on PC. Plus there always has been popular demand for people wanting to play the games on PCs rather than the console as PC can always give better performance when it comes to games.