@notplants The lcd segmented displays on the old Nintendo Game & Watch have crisp edges 🤷

To actually respond to your question though, the metric you are looking for is "pixel density", similar to "DPI" (dots per inch) from the world of printing.

Celly Phones have really high pixel density screens. You could probably just peek at your friends' phones and see how they look to you, and then look up the model of phone online and see what its pixel density is, then compare that to laptop screens.

Apple is the main hardware vendor for super high pixel density screens on laptops. There are also some other laptops that feature 4k screens, but in general those are the kind of products that I would personally try to avoid as much as possible -- expensive blinged-out and consumer-oriented products that sacrifice functionality for impressive sounding specs.

Cuz here's the thing. The number of pixels goes up as the square of the pixel dimensions of the screen. So the finer the edges of the text get, the exponentially more power the machine will consume, the more complex the software to display things on the screen will have to be, etc.

I think apple actually renders a lot of non-text things at 1/2 scale to give the machines decent performance. When I play video games, even on my 1680x1050 display, I turn down the rendering resolution to make the game smoother. When I'm working with video, especially capturing video, again, I turn down the resolution a lot so that people who I am presenting the video to can actually see WTF I'm doing.

Personally I don't think all the problems that come with using a high resolution display are worth it. If you really just want a 4k display on a laptop tho, I'm sure there are some products out there you could buy, even used ones these days.