I think in order to appreciate a higher pixel pitch or otherwise lower PPI, you have to have minimal screen door distance in the panel. That is, the physical border around each of the 3 LCD elements per pixel must be as small as possible.
I had an Westinghouse LVM-37w1, which was an ancient 1080p panel from late 2005. It used one of the first large format, 1080p, high quantity panel runs from Chi Mei. The colors were bad (but nothing awful), the matte coating was okay(but left fingerprints like hell), and the motion blur was pretty awful(that did kind of suck). However, the input lag was basically zero and the screen door distance of the pixels was fantastically low.
I don't think I can even describe how redeeming those two things really amounted to being over the 5 years I had the display. My friends preferred playing on a quarter of my panel vs half of another CRT I had when we would do console LAN. Movies looked surprisingly good. It was just such a damned SMOOTH display.
The only thing that can explain it is the tiny screen door distance the panel had. Right off the bat, you have substantially less aliasing from all sources. Color gradients and grayscales appear smoother because your brain has many microns fewer of a ridge between shades to grab onto.
I used to sit absurdly close to that display, like, 2.5 feet. I would NEVER have done that with 95% of the large panels I have seen. The screen door distance is just far too large. When the backlight went out on the Westinghouse, I replaced it with an LG D2342P 3D 23" panel, but it just isn't the same. I sit a bit closer, but I can see pixel edges and aliasing now where I simply could not before.
What matters just as much as raw PPI, in this case 1080p vs 1440p at 27", is the total pixel element area. That thin grid that separates the pixel elements has a measurable area takes up a non trivial proportional of your total display area and obviously is best when taking the smallest proportion. Though I hear about dot pitch all the time, I never hear about active vs inactive dot pitch. A panel with zero inactive dot pitch is going to look strictly better than a panel of equal size and res but with 50% inactive dot pitch.
Thoughts?