Things are fast, chaotic, cheap, and out of control. Ad hoc is the new plan. There’s a new cultural strange attractor at work, sucking in the young, smart, deracinated mechanistically-minded readers who used to be the natural prey of the SF movement. It’s geek culture. You can find it in the pages of Wired (although it’s a pale shadow of what it used to be) and on Boing!Boing! and Slashdot. You can find them playing MMORPGs and hacking their game consoles. These people have different interests from the old generation of SF readers. And unfortunately they don’t buy many [fiction] books, because we aren’t, for the most part, writing for them.
This isn’t to say that they don’t read. There is a literary culture that switches on the geeks: it started out as a branch of SF. Yes, I’m talking about cyberpunk. But while cyberpunk was a seven day wonder within the SF field, which subsequently lost interest, the geeks recognized themselves in its magic mirror and made it their own. This is the future they live in, not the future of Star Wars and its imitators, of the futures of Isaac Asimov and Robert Heinlein. And in addition to cyberpunk — the golden age SF taproots of their field — some of us are beginning to address their concerns. Among the quintessentially geek authors, the brightest names are Neal Stephenson and Cory Doctorow and Douglas Coupland and (in his latest incarnation) Bruce Sterling. (I’d like to append my own name to that list, if only to bask in their reflected glory.)
The authors I listed above are not writing SF for your traditional SF readers. They are writing something quite different, even if the forms are similar, because the underlying assumptions about the way the universe works are different.
I’ll happily quibble with some of the detail in Stross’ post — in particular, I think it’s a bit misleading to imply that everyone who isn’t writing slashdot sf is writing about obsolete First-sf futures — but I think he’s spot-on about the nature of the geek audience.