What is does is allow a brain to survive without its own body's blood flow, and there are other, artificial ways to do so (or cryonics, as well).
Cryonics doesn't allow a brain to survive without its own body's blood flow.
Cryonics doesn't allow a brain to survive, period.
Cryonics involves killing a brain (or preparing a dead brain) in such a way as to maximize the chances that some future technology can extract its instantiated mind.
A worthy goal, but a different one.
Cryonics involves killing a brain (or preparing a dead brain) in such a way as to maximize the chances that some future technology can extract its instantiated mind.
[edit to take away the quibble about definitions]
Cryonics keeps open the possibilities both of uploading and robust repair scenarios. Assuming that it will play out one way or the other is unnecessarily specific for a belief about the future. There may be e.g. cultural or contractual reasons to repair people instead of extracting the information to instantiate on a digital substrate.
Amazing video. This is really "out there" medical research that actually worked, and not surprisingly, was closed down.
http://www.vbs.tv/newsroom/dr-white-s-total-body-transplant-2-of-2--2