[wongarsu]

And image sizes aren't really bound by human perception in any real way. Yes, screens typically range from 2-8MP, and probably won't go much beyond 32MP. But more resolution, more dynamic range, more color fidelity are incredibly useful for editing pictures; and you can always add resolution to add digital zoom.

Photos are however constrained by physics. There are only so many photons captured in a certain area in a given time, so no matter whether we talk about the tiny lenses and sensors of smartphones or the much larger versions on dedicated cameras there's a very real limit (and phones are pretty close to the limits imposed by their sensor size)