I think the current tech curves suggest it will never be developed before it isn’t needed. The human brain is extremely fragile, complex, and not designed to tolerate freezing. There may simply not be a way to freeze it without installing so much support nanotechnology that the brain is essentially artificial.
While making AI better than humans at task n is mostly an engineering problem, assuming a good definition of what it means to do well at task n is available.
I think the current tech curves suggest it will never be developed before it isn’t needed. The human brain is extremely fragile, complex, and not designed to tolerate freezing. There may simply not be a way to freeze it without installing so much support nanotechnology that the brain is essentially artificial.
While making AI better than humans at task n is mostly an engineering problem, assuming a good definition of what it means to do well at task n is available.