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Human Brain Cells on a Chip for Sale: World-first biocomputing platform hits the market
(spectrum.ieee.org)
I want one! Examples given include the obvious AI/machine learning, medicine, research, even music composition using cells of a "dead composer". Sadly the cells only last for six months and you need to be able to prove that you have a suitable lab to keep the cells alive. They do talk about being able to easily scale up to many millions of cells which would be revolutionary for AI. Low-powered and possibly easier to train than traditional AI.
The developers trained a set of cells to play pong, but they found they it didn't bother to learn when they wanted to. They had to stimulate it with a regular pulse of electricity and punish it with electrical noise when wrong! Maybe they need to work in dopamine as a way of rewarding the cells.