Dude sony given their tv movie and games are going 4k, theres little to no chance that their next console will not be build for 4k. Especially even more so how important PS is to their overall sales strategy.
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