Statements like this make me assume the author of this article may be very young, as in the early 2000s tons of mobile phones and media players had colour LCDs with I2C interfaces, including famous Nokia models such as the 6100. 128x128, 132x132, 176x128, and similar sizes with 4k and later 64k colours was very very common. Some devices could play video on them too.

Edit: there is a somewhat de-facto standard for these small graphic displays and their instruction sets, split between "Philips clones" and "Epson clones", much like the HD44780 did for character displays: https://web.archive.org/web/20150912171758/http://wiki.s1mp3...