I'm pretty sure that if you asked him, he'd tell you he's still a Trotskyist at heart.
I'm not sure what this means.
He still has high regard for Trotsky and the historical movement of socialism. (Here is evidence, dated 2005, and more, dated 2004.) So you can certainly hold that against him if you are so inclined.
I interpret his statement in Reason to mean that socialism (and so presumably Trotskyism) has outlived its utility. And not because the movement has died out (as I read it) but because society has progressed beyond anything that the ideology of socialism can address.
Edit: Added another reference.
Christopher Hitchens is probably dying of cancer. Hitchens is a well known author, journalist and militant atheist. Having read much of his work I believe he is also a very high IQ rationalist who enjoys being provocative. He has written "I am quietly resolved to resist bodily as best I can, even if only passively, and to seek the most advanced advice."
Hitchens should be extremely receptive to cryonics. Convincing him to signup would do much for the cryonics movement in part because he would immediately become our most articulate member.
I have written to him about cryonics, but I suspect he is getting tens of thousands of emails and probably won't ever even read mine. I propose that the Less Wrong community attempt to get Hitchens to at least seriously consider cryonics. We could do this by mass emailing him and by linking to this blogpost.
Here is an article in which he talks about his cancer. His email address is at the end of the article.