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OLED monitor momentum expected to continue — analysts expect 1.34 million units shipped by year end
(www.tomshardware.com)
This is a most excellent place for technology news and articles.
It makes a lot of sense for non-gaming tasks. Text looks great and non-fractional scaling makes a big difference. Try it for yourself, there are several non-"gaming" (60 Hz) 27" 5KUHD monitors out there. And remember just because you can't notice a difference doesn't mean no one can.
And for gaming: most GPUs can't drive most games at native 4KUHD. Some form of temporal upscaling (DLSS, XeSS, FSR, TAA etc.) is usually required anyway, and whether you're upscaling to 4KUHD or 5KUHD from the same internal resolution doesn't have a big performance impact.
Text looks perfectly fine from a normal distance on a 27" 1440p monitor. And yeah, the pixel count IS significantly higher. It's about 16% more.
However, if you want higher power consumption and much lower fps for little to no gain, you do you brother.