Charlie Jane Anders wrote an interesting polemic on io9 concerning the growing importance of Young Adult literature for the science fiction genre.  The question presented seems to be whether the popularity of Young Adult science fiction is a death knell or a cry of rebirth for a genre that many argue is experiencing a decline, given an arguable dearth of new, successful science fiction writers.

It's been 20 years since Bruce Sterling compared the "mainstream" of science fiction to a fossilizing Politburo. Since that time, the situation has only gotten more dire. People are constantly remarking on the graying of science fiction readership, but statistics seem to be hard to come by. . . .

Meanwhile, young-adult science fiction is exploding. According to John Scalzi, the top 50 young adult science fiction/fantasy bestsellers sold twice as many books as the top 100 adult science fiction/fantasy bestsellers. As we mentioned before, there have been hardcore post-apocalyptic novels for kids and young adults for decades. With more on the way. And with City Of Ember finally being adapted to a (hopefully) major movie, more YA readers than ever will be looking for similar stories.

Ms. Anders's opinion seems to be that we should realize that Science Fiction is not in as dire straits as some have said, and that "we should especially celebrate the awesome potential of YA SF to revitalize the field, and bring new readers to SF concepts."

I can't say that I agree.