The thing is, only Apple computers really need it, because of their technical choice on resolution scaling, where only x2 do not give you a blurry mess on macOS

The thing is, only Apple computers really need it, because of their technical choice on resolution scaling, where only x2 do not give you a blurry mess on macOS. 5K is nice but not necessary for other platforms, you can get a 4K display scaled to 150% and it's still a good pixel density with same workspace size as a 2560x1440 display.