as a technology is different from cybernetic immortality
in that the physical body (or at the very least the brain
) is preserved. This eliminates any arguments about the status of consciousness
or the soul
A brain in a jar could live on in a robotic body, or as an integral part of a larger device such as a tank, spacecraft, or computer, as has been written about in many Sci-Fi stories. At the very least, the disembodied brain could be placed in a virtual reality environment that could be linked for communication/gaming/virtual sex with other brains.
Indeed, one could imagine a facility dedicated to "retirees" who have outlived their bodies, pushing off oblivion by as long as possible. Maybe at the point the brain is about to die the person could take the risk and transfer their mind into a computer at that time.