pixels have been around for a while but since they have became more devoloped everything seems to have them, clocks, watches, even billboards.
when they first started out they were games like pong which was quite advanced for its time but quite rapidly the games improved and soon they had characters in the games and there were actual storylines with like mario.
He was the guy who technically invented pixels, not exactly like the ones we see now, but he figured out how to make the worlds first digital photoagrapgh.