In article om, Peter
R. wrote:

I used to have a 2.1mp but I found that cropping more than half the
picture would result in a remaining picture that was too grainy. Having
more megapixels means having more cropping options for those times the
subject was too far away.

"Grainy" describes film. (grains of silver-halide crystals)

"Pixilated" describes digital images. (little square elements, pixels,
that make up the ccd image sensor)