Have Science Fiction Books Become Too Self-Referential?

"Science Fiction has become an exclusively literary genre, with books inspired less by new scientific research than by previous science fiction books, and, regrettably, movies. Ideas turn into tropes, and instead of extrapolation, we get variation: of the generation star ship, the space alien, the artificial brain,ā€¦ » 3/27/09 1:17pm 3/27/09 1:17pm