Hot take here, but I think the version of this experiment that used rat neurons instead of human neurons was more interesting. I can't look for the link right now but there's a video on Youtube, the equipment and techniques are fairly similar.

We know a human can play Doom, so it kind of makes sense a portion of a human brain can do so in some fashion. But it's way more interesting when an animal that normally doesn't play Doom can, specially if it's just a portion of its brain.

Outside of that, I'm personally not very fond of hardware that can rot or die from malnutrition though. It's fun as an experiment, but as a thing you can actually use I just don't see it. It has a literal limited lifespan, requires more maintenance and imagine trying to debug it ("Turns out it caught some bacteria and it's malfunctioning" kinda scenarios? No thanks.)