8 of 9 people found the following review helpful
A good sweet spot to "not" see the pixels,
This review is from: Apple MC914LL/B 27-inch Thunderbolt Display (Personal Computers)
I did some calculations for a 27 inch display for 2560 x 1440, a 23 inch one for 1920 x 1080, and 21.5 one for 1920 x 1080.
The 23 inch for 1920 x 1080 has the biggest pixel size, and it actually is not so comfortable to see the pixels. (I actually tested such a display with LED and IPS with a Mac Mini (a Samsung IPS235T), and found that each individual pixels can be seen).
The 21.5 inch for 1920 x 1080 has smaller pixels, but the pixels can still be seen. (we can go to the Apple Store and verify this easily).
The best is the 27 inch for 2560 x 1440, which is actually quite a sweet spot, and I think Apple makes the 27 inch for this reason, instead of making it 30 inch like the old models of the Cinema Display.
For the 27 inch model, I cannot see the pixels -- and Retina will be even better, but before any large display has Retina, the 27 inch model with 2560 x 1440 already is quite good for not making each pixel apparent. The font is a lot smoother, and for some reason, I don't feel the font being too small either. And most of the time, I use the web or other tools, for which the font can be adjusted to 12 points, 16 points, or 18 points or larger if needed. If using a browser, the key COMMAND + can be pressed, to make the font bigger, and COMMAND 0 to make the font back to normal again, so the font size is not an issue.
So to this I feel Apple has done a good job, at creating yet another product that "makes sense" -- something that users may find that it is a good design -- either by the left brain or the right brain.
Also note that this display is an LED + IPS display, so it is probably one of the best out there... the TN panel is said to be slightly not as versatile ... you can find some comparison on YouTube if you search for IPS vs TN.