I use DSR x4.00 factor and reshade filters : DPX, Clarity and sometimes adaptive sharpen, fake HDR, Curves, ambient light etc.
1440P monitor - 5K with DSR
4K TV - 8K with DSR
On screenshots 5k or higher I dont see any difference with AA on or off.
And I am not sure if can see any difference between a 3.5mb .jpg vs 40mb .png
Maybe because of reshade