Hi AzN!
How are you? I know it can be hard when you try to get your head around something and you are stuck somewhere and can't break the loop...
Pixel pitch is an interesting figure, but it combines 2 variables in one figure and that makes it hard to get your head around the concept...
I give you an easy example...
You go into a shop and you buy a 21.5" monitor with 1920 x 1080 pixels and also a 24" with 1920 x 1080 pixels... Now please note that the resolution is the same, but the size is not. And pixel pitch combines resolution and size, so pixel pitch will be different... The 21.5 has 0.248 and the 24" has 0.276 (these are real figures from Benq).
Now you hook up the monitors and launch the game...
Lets say you put the screens in clone mode (same image) and we are looking at a gaming character.
The character will be the same size in relation to the screen size. So on the 21" it will be a little bit smaller. On the 24" your character will be slightly larger...
Now you get really close and count the pixels of your gaming character. Well guess what, they end up the same!
Do you get the idea?
So yea pixel pitch can be diseaving...
Yes pixel pitch means more pixels per area. But the area also changed (because you have a larger monitor) and that makes pixel pitch diseaving...
Let me know if you got any more questions mate!
EDIT:
One more note... There is another factor here, our eyes... The 21.5" and the 24" will output the same information. But our eyes will find it easier to take in the information on the larger display (assuming you use the same viewing distance, which most people do).
On the other hand the more information you see, the more "imperfections" you will notice. And in this regard getting a smaller screen (or sitting further away) can work in your favour
The most detail you will get out of a 30" LCD. They run at 2560x1600 resolution.