"I will share a better explanation to the idea for this article in a later section, but here is a short version: How much an impact, if any, does the aspect ratio have on performance? Beyond any doubt, 16:9 is the most common aspect ratio, and the differences between a 1920x1080 and 2560x1440 display or image can be thought of in terms of sampling frequency (120 for 1920x1080 and 160 for 2560x1440), but between widescreen 16:9 and ultrawide 21:9 or standard 4:3, the differences are not so linear."



Link: OCC