Speaking of, I've just found out that two LCD versions of Pac-Man, Space Invaders and a few others (as seen in the Amazon listing here: https://www.amazon.com/Arcade-Classics-Pac-Man-Retro-Mini/dp/B01DK2WO1C/) were released back in 2016.
Video:


The Pac-Man one seems to have been rereleased as a "New color screen!" version, also:



Kind of weird that they made them as limited old-school liquid crystal games, but they're kind of cool nonetheless.