extropianism as literary movement?

News to me, but it seems transhumanism is now considered to be a literary movement. Philosophy, yes. Political movement? ...could soon be. But artistic school?

Check Warren Ellis' wikipedia page:

Warren Ellis
Born	February 16, 1968 (1968-02-16) (age 40) Essex, England
Occupation	writer
Nationality	British
Genres	science fiction, superhero
Literary movement	Extropianism, Transhumanism
Notable work(s)	Transmetropolitan Planetary The Authority Nextwave Global Frequency
Notable award(s)	Eagle Award
Official website

Genre, I could see... but literary movement? Any artistes out there want to weigh in on this?