I have an odd monitor setup: main monitor is a 23" 4K, above that is our old HD TV - a 36" screen with 1080p resolution. To the right is an old 19" Mac monitor

I have an odd monitor setup: main monitor is a 23" 4K, above that is our old HD TV - a 36" screen with 1080p resolution. To the right is an old 19" Mac monitor with the odd resolution of 1680x1050, and on the left is an ultra-wide 2K monitor with 2560x1080 resolution. The old HD TV is certainly not as crisp as the 3 computer monitors - so I have it located behind and about 3 feet back and up. At that distance the fuzzy pixels are lost, and I can use it as a reference monitor quite well. I have the funky setup so I can insure the software I write handles layout correctly with the different aspect ratios and pixel scaling factors the OSes throw in.