[kpil]

While dead brains might be cheaper than electronic, I doubt that growing neurons in a lattice and doing what you want will ever be.

There is some research going on in using spintronics for neural network, and I think that both density and power usage would be a fraction of a biological system.

There is probably a long way until we can emulate human brains, but for generic neutral networks, I think electronics or spintronics is the probable route.

[visarga]

We first need the algorithms and datasets. Deep learning needs to learn general reasoning skills.