People who tend to buy the expensive 4K or high refresh rate 1440p monitors will also buy expensive GPUs. At most technology like FSR and DLSS just offer more options for settings as those cards age out.
Frankly, 1440p isn’t even necessary. There are a lot of great 1080p displays and most people with midrange or low end cards are still using that resolution. Turning up the quality settings at 1080p often produces better visuals than running lower settings to hit acceptable frame rates at higher resolutions.