I know nothing about the relevant biology. But if head transplants wind up working, are cyborgs closer than I'd thought? The rest of the meat is just a way of delivering oxygenated, cleansed, nutrient-rich blood to the brain, right? If we can couple heads to new-meat, is it that much harder to couple it to a machine able to provide that? Wouldn't it be simpler, as robot-body wouldn't reject the head? And there's always this inferior option:
In related news, I've a short op-ed in the Herald on compensating live organ donors.
* I specifically decline consent to anyone who caused the head injury resulting in the meat's becoming available.