That CubeWorld thing in the video looks curious, I'm not sure how we'd emulate it, you're literally meant to plug dozens of them together, with them knowing which side you've connected them in order to do animations that span across multiple screens. Also possible each one has different code (or if we're lucky the different behaviours will be a jumper pad inside or something) Either way that will be a real test of MAME as you'd probably have to have a base system that was one of them, and also allow that system to be a pluggable device, with each one adding a slot for all 4 sides of the cube (8 slots on the big ones?) that could be plugged into any given side of another cube (so you'd need source AND destination 'slots') and add a new screen / layout to the system each time. MAME would need some architectural improvements to handle that for sure! Looks like a fascinating idea tho, with units running different kind of games that respond differently depending on the other cubes you connect.
I gave out a few of those CubeWorld things as gifts back when they were new, I thought they were cute. We had fun watching the little stick figures interact with each other, it reminded me of Tamagotchi. I know a few people who might still have theirs somewhere, assuming the batteries haven't exploded.
