Visually, a 24" 1440p monitor is 122 pixels per inch, whereas a 24" 1080p monitor is 91.8ppi. A 27" 1440p monitor is 108.8 ppi. Without Windows' scaling, the higher the ppi, the smaller everything looks onscreen. Windows ppi scaling does counteract the size issue whilst maintaining the increased density/clarity.
Also, the more pixels your PC has to draw, the more graphics horsepower it takes to do so. Therefore, it will take more GPU to drive a 1440p monitor than a 1080p one. You're probably in the $200 GPU range for 1080p and $350 for a 1440p one. That price structure is unlikely to change much in the future.
Then consider the field of view (FoV) that a monitor takes up and its effect on "in-game immersion". In my opinion, 27" is the sweet spot for being large enough to provide an immersive experience, and once you get over 32" it's too big from a "normal" (aka fingertips) sitting distance.
Last edited by DPete27
on Tue Jul 23, 2019 8:05 am, edited 1 time in total.
Main: i5-3570K, ASRock Z77 Pro4-M, MSI RX480 8G, 500GB Crucial BX100, 2 TB Samsung EcoGreen F4, 16GB 1600MHz G.Skill @1.25V, EVGA 550-G2, Silverstone PS07B
HTPC: A8-5600K, MSI FM2-A75IA-E53, 4TB Seagate SSHD, 8GB 1866MHz G.Skill, Crosley D-25 Case Mod