(image: https://farm8.static.flickr.com/7549/15871841822_d25fa4862c.jpg)For instance, a 1080p monitor is simply an array of pixels that is 1920 pixels wide and 1080 pixels tall. Pixels correspond to detail and sharpness, with higher resolutions enabling greater detail. However, resolution by itself doesn’t tell the full story. One must also take into account screen size, and the resulting measurement of PPI, or pixels per inch. The perceived fidelity of a screen isn’t based on resolution alone. View distance and PPI are actually much more important. Assuming an average viewing distance, the ideal PPI for a PC monitor should be around 90 PPI or higher. 1440p resolution at 27 inches, which actually goes up to 108 PPI! You can actually go up to 32 inches and hit 90 PPI, which will mean no noticeable loss in fidelity compared to a 24-Inch 1080p monitor! 4K resolution at 32 inches, which actually goes up to 137 PPI! That still leaves a lot of room for expansion, but monitors…

’t really get much bigger than that. You’d have to use a 48-inch TV at the same viewing distance (which would not be comfortable) to go below 90 PPI. Keeping these PPI targets in mind, we chose our selection of monitors. Almost all of our 1080p monitors (sans the 240 Hz ones) are 24 inches or under, which keeps them looking sharp. All of our 1440p and 4K monitors are 27 inches or larger, which ensures all that extra fidelity doesn’t go to waste on a screen too small for anyone without 30/20 vision to see it. Have you ever booted up an old GameCube or PS2 game on your shiny new TV, and felt like it looks worse than you remembered it? Sure, it’s at a lower resolution, but that can’t be the only reason why, right… You aren’t crazy: old games actually do look worse on modern screens, at least when they don’t match the screen’s full resolution.

And that’s because of something called pixel scaling. Old screens which used CRT technology didn’t really have to do much pixel scaling. They could display any image at any resolution within its range without any noticeable artifacts or blurring, provided the original image was up to snuff. Explaining the exact physics of all of this is a little bit complicated, but basically, it boils down to how CRTs displayed images, almost like a projector compared to how LCDs handle it. Unfortunately, the switch to LCD has actually made things worse. That’s because every pixel on your screen is now a physical object, and if you’re running in fullscreen, each and every one of those pixels has to be doing something. In order for you to accurately scale a lower resolution to your screen’s higher native resolution, that lower resolution must be one-fourth of your screen’s native resolution. Think about it: pixels are squares, right? To make a square larger, you have to quadruple it in size by adding three other equivalently sized squares.

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