This is helpful for estimating how much higher display resolutions are still perceivable and when we enter the territory of "marketing bullshit".

For example:

- 40 cm view distance (e.g. smartphone): 300 ppi is roughly the maximum that's useful

- 100 cm (e.g. desktop monitor): about 200 ppi

https://www.nature.com/articles/s41467-025-64679-2/figures/2