Last year, Monash University scientists created the "DishBrain" – a semi-biological computer chip with some 800,000 human and mouse brain cells lab-grown into its electrodes. Demonstrating something like sentience, it learned to play Pong within five minutes.
I wonder, at the point where it’s neurons making up a very small piece of tissue, what benefit human cells give over something like a pig (the article does say human and mouse, but still).