It sells people confidence that their mind can be preserved by freezing it.
http://aidevelopment.blogspot.com/2008/12/cryonics.html
That said, the author seems to be a true believer in Cryonics (however that does not make Cryonics legitimate).
The article has interesting points, but cannot really be trusted, because of multiple outrageous statements.
For example, the author states: "In hindsight, it seems clear that if humanity had decided in 1939 to colonize space, instead of ... war [WW2], we would have ... very likely self-sustaining outposts on the moon and Mars."
As of today, the humanity does not have self-sustaining outposts even in Antarctica. Self-sustaining outposts on Mars are totally unrealistic in the next 100 years. Not only because of technological impossibility, but mostly because of no need for that.
The bottom line: the author is unrealistic dreamer. His ideas might be unusual (which is good), but it's better to be very skeptical and not to trust these ideas by default.