Use a screen's size and resolution combined with your viewing distance (from your eyes to the screen) to calculate the Pixels Per Degree (PPD).
Colour Depth = 8-bit, 10-bit, 12-bit. This allows for decreased banding when showing higher brightness images. You can map 8-bit to 1000 Nits Brightness. Mapping 10-bit to 1000 Nits Brightness makes much more sense. The OS and application must explicitly support HDR. Remember, colour gamut is different to colour depth.
The refresh rate, input lag, and pixel response time are all linked. A better pixel response time will reduce motion blur. Better input lag (signal processing + pixel response time) will improve the perceived responsiveness (+ improve accuracy of input tasks like typing and mouse movement) High refresh rate will give a better experience. Variable Refresh Rates may be helpful (see video by battlenonsense) for tear-free + lower input lag. Tear-free is accomplished by VRR, Vertical Sync (Double-buffer), and Vertical Sync (Triple-buffer - two interpretations). An alternative to high, variable refresh rate for motion blur reduction is black-frame insertion, which is more like a CRT. The OS and application must explicitly support VRR.