|Abbreviation||Resolution, aspect ratio|
|FWXGA 1st||1366x768 16:9|
|FHD (Full HD) 2nd||1920x1080 16:9|
|13in MacBook Pro 2012 or later||2560x1600 16:10|
|15in MacBook Pro 2012 or later||2880x1800 16:10|
|27in iMac 2014 or later||5120x2880 16:9|
|13In MacBook 2015 or later||2304x1440 16:10|
|4K UHD||3840x2160 16:9|
|21.5in iMac 2015 or later||4096x2304 19:9|
|13In MacBook Air 2018 or later.||2560x1600 16:10|
|16in MacBook Pro 2019||3072x1920 16:10|
|All iMac Pro||5120x2880 16:9|
The most popular computer screen resolutions
The most popular computer display resolutions in 2021 are 1920x1080 and 1366x768, with around 20% of share each. 1366x768 is for smaller and cheaper monitors. 1920x1080 is a Full HD video screen format accepted as the standard in Blu-ray and digital TV broadcast. An HD movie does not fit a non-HD screen quite right. The popularity of Full HD resolution particularly became obvious after YouTube added support for 1080p in 2009. If a screen has an odd resolution to HD, for example, 2560x1600, you still see the HD movie in full-screen mode, but it is not as sharp as on the screen's lesser resolution. In that case, reducing the viewing window size respectively to the picture would help. Also, they design computer programs and operating systems natively for HD resolution. When you have a different resolution, you likely have to adjust windows and fonts to fit the program's interface. If I upgrade the monitor, I'd want resolution even to 1920x1080. The next resolution up would be 3840x2160 which is a native 4K.
Computer screen refresh rate
The other important specification of monitors is the refresh rate. The prevalent one due to monitor prices is 60 Hz. However, the better refresh rate for eye health is at least 75Hz. 60Hz was chosen due to TV hardware limitations in the 1950s and electricity frequency. It is on the verge of human capabilities. Prolonged viewing of an image flickering 60 times a second leading to red eyes, fatigue, etc. unwanted effects at the workplace.