Firstly, I don't get what ur responding to cause I said I would hope that its more than 1080p 60fps and 4k will become very popular so yea?
Secondly, Considering how the ps4 cant even do 1080p 60fps in most games in a time where virtually every gaming PC can do 1440p 60fps, I wouldn't be surprised if the ps5 wont be able to achieve 4k but we will see. If it does, great, if it doesn't please be more than 1080p
PCs archieve higher performance dueto every single triple AAA game being a console port. If the pc would get real tripple AAA exclsuives like crysis was in 2007 you wouldnt archieve 1080p 60 frames at all.
And i really doubt every gaming pc can do 1440p, most people dont even have such a monitor. The ps4 is a fine machine that archievs almost all games in 1080p for 400$ thats less what a 1440p monitor will cost you.