Speaking as a developer, who is also porting the game to PC on investors demand. IMO PC is cancer for gaming, without consoles, gaming market will crash. Every developer worth his salt and that has developed for AAA games will tell you engine scaling on gazillion of combination of PC hardware efficiently is a pain in the ass, not to mention there are 100 different guidelines from different PC part manufacturers (looking at you Nvidia)
2. Piracy is the biggest threat, smaller developers cant afford to have a strict DRM, coz if the game is any good it will be pirated, and many countries dont have that robust internet or infrastructure to go online only.
3. Multiplayer Hacks Killing the fun, (cant wait to see how Destiny 2 deals with this issue)
4. Trophy and achievement, Why would me as a third party developer put in extra effort to put in those features. if i dont have to go through Sony and MS certification??? Again Not to mention those feature will be hacked to death.
5. Related to graphical settings, this will be like dick measuring competition among publishers and developers, pushing development cost through the roof or long development period.. best example (Star Citizen)
In short Single PC platform will be heaven for gamer's and a hell for developers and publishers, If there was money to be made on PC as much as console, Sony would have been on it and PSnow is just their way recouping cost of gaikai from users outside of playstation eco systems,
TBH I like nintendo's approach... not a powerful hardware, which forces developers to think outside of the box and come up with new idea and fine tune the code to get the best out of the console with less glitchy game. And with Switch they are heading in right direction (in this day and age console's should be hybrid). but nintendo third party relations still needs lot of work.