I am reviving this old thread to comment on the LCD industry's impressive recent advances. These are exciting times for us LCD enthusiasts indeed, and I will limit this post to desktop monitors.
Before 2005, only several sizes and resolutions were readily available: 15" 1024x768, 17" 1280x1024, 19" 1280x1024, 20" 1600x1200, 20" 1680x1050, 22" 1680x1050, and 24" 1920x1200. The only high-res LCD monitors were 20.8" 2048x1536 (e.g. the subject of this thread) and 22.2" 3840x2400 (IBM T220 and T221), but they were rare, bulky and prohibitively expensive, and the T220/221 required special video cards. Then, in 2005, the first 30" 2560x1600 monitor (Apple's Cinema Display) came out, which was an exciting addition but unfortunately 30" 2560x1600 remained the highest widely available resolution for a while.
However, since 2012, the number of options exploded thanks to Apple's popularization of "retina" resolutions and the industry's push for 4K televisions. Nowadays, my favorite form factor is 40" (39.5" viewable) 3840x2160, and I now have two such monitors (see viewtopic.php?t=52525
). In a way, the subject of this thread (20.8" QXGA) has "reincarnated" as 24" (23.75" viewable) 2560x1440, whose 123.7 DPI pixel density is nearly identical (123.1 DPI for 20.8" QXGA), though total pixel count has gone up 17.2%. Even the T220/221's 22.2" 3840x2400 has been exceeded in both pixel count and density by 27" 5120x2880 monitors.
Here's a photo of my Dell P2416D, next to my Dell OptiPlex 790 USFF desktop:
But I found its pixel density a bit too high anyway. I now have three Dell 2407WFP's at work and their lower density of 94.34 DPI is just right.
I wrote that in Sep 2009. Since then I have adjusted to higher DPIs. These days, I consider 110 DPI to be the sweet spot for desktop displays that aren't scaled. Several size/res combinations are between 108 DPI and 113 DPI:
27" 2560x1440 @ 108.8 DPI (I have three)
34" 3440x1440 @ 109.7 DPI
25" 2560x1080 @ 111.1 DPI (I had one)
39.5" 3840x2160 @ 111.5 DPI (I have two)
19.5" 1920x1080 @ 113.0 DPI
The above-mentioned 24" 2560x1440 (123.7 DPI) looks significantly smaller than 108-113 DPI, but it's still reasonably comfortable for me to view even without scaling. The next higher pixel density is 139.9, on 32" (31.5" viewable) 3840x2160 screens. I haven't tried one yet but I probably would need to scale at 125%. I certainly needed to scale the 28" 3840x2160 Dell P2815Q (157.4 DPI) that I had for a year.
I think i would find 24" in portrait mode too high
That corresponds to a screen height of 20.35", which is tall but not "too" tall IMO. My rotated Dell P2416D is 20.70" in height, while the 39.5" monitors are 19.37" tall. Actually, my 27" HP ZR2740w is rotated as well! At 23.53", it does feel slightly too tall, but just slightly. Rotated widescreen monitors not only display more lines of text and save desk space, but also encourage the user to sit up straight. Hunching is one of the many reasons I dislike laptops.