Dithering 

The article mentions that:

Pointillism is analogous to the four-color CMYK printing process used by some color printers and large presses that place dots of Cyan (blue), Magenta (red), Yellow, and Key (black). Televisions and computer monitors use a similar technique to represent image colors using Red, Green, and Blue (RGB) colors.

The technique used by CMYK printing is dithering, among others. The CMYK article even says so. Should there not be mention on this page of dithering, especially seeing as how it's popularly used for sprite and pixel art with a constricted palette?