>I think the point the parent is making is that human vision has limited resolution. I.e. for a given screen size & distance from the screen, you cannot notice any difference in DPI past a point. The parent is suggesting that 1080p & 27" with a typical viewing distance is already higher resolution than the eye can resolve. Looking at my 1080p 27" screen from a metre away with 20/20 vision I am inclined to agree!
Are you sure you have 20/20 vision? I can absolutely resolve individual pixels with zero effort whatsoever on 1080p 27-inch displays.
Back when I had a 27-inch 1080p display at work, my MacBook's 13-inch Retina Display effectively became my main monitor. The 27-inch monitor was relegated to displaying documentation and secondary content, because I found its low resolution totally eye straining
Edit: I might have found it so eye straining because MacOS does not support sub pixel rendering. That means a lot of people will need a 4K or Retina monitor to have a comfortable viewing experience on the Mac.
MacOS does support subpixel rendering, has at least since the early to mid 2000s. One or two versions back though they turned it off by default since it isn't necessary on HiDPI "Retina" displays and they only ship HiDPI displays now.
You can still turn it on although it requires the command line.
Subpixel rendering dramatically slows down rendering text. When you have a high res screen, and want everything to be 120fps, even text rendering starts to be a bottleneck.
That combined with the fairly massive software complexity of subpixel rendering is probably why mac dropped it.
Been a while since my eyesight tested, but I think so! I can see pixels if I focus but not when reading text at any speed. I have also checked and my display is only 24" (could've sworn it was more!) so maybe that's why. I retract my comment :)
Are you sure you have 20/20 vision? I can absolutely resolve individual pixels with zero effort whatsoever on 1080p 27-inch displays.
Back when I had a 27-inch 1080p display at work, my MacBook's 13-inch Retina Display effectively became my main monitor. The 27-inch monitor was relegated to displaying documentation and secondary content, because I found its low resolution totally eye straining
Edit: I might have found it so eye straining because MacOS does not support sub pixel rendering. That means a lot of people will need a 4K or Retina monitor to have a comfortable viewing experience on the Mac.