Not sure why people seem to think 1440p is so prevalent outside of pc monitor market.
Newsflash.
It isnt.
It isnt, but some people do use PC monitors to play on consoles.
The thing is, this is not something that needs sony to put in new hardware into the machine its a software configuration change. I remember my old xbox 360 supporting 1050p output so I could use my dell 2209wa at native resolution, Microsoft were doing this stuff a decade ago.
Also I expect more people use 1440p than 8k.