A lot of monitors (used to) to out at 1920x1080 (HD TV), so the bigger the monitor the bigger (not more) dots. That's still true today although there are more choices.
The spec you need to look for is the DPI (dots per inch), but nobody gives you that anymore.
Take a 27" 1080 display, which has around 290 in2 of display space, vs. a 32" 4K monitor which has 2x2 = 4 the number of pixels in 1.4x as much space.
More, smaller pixels will make it easier to see the details.
Also remember that the 4K (3840x2160) display is about 8MP. Depending on your camera/microscope, you might be able to significantly zoom in.
-----Burton
50+ year / Life / Emeritus
ANA member (joined 12/1/1973)
Life member: Numismatics International, CONECA
Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club
Owned by three cats and a wife of 40+ years (joined 1983)
Author: 3rd Edition of the Sample Slabs book,
https://www.sampleslabs.info/