It's not that I think the genre actually is dying...
But between the "the book is too good to be SF" and "SF is just a label" memes the genre *is* in danger of losing its limited but hard won respectability, especially with the increased proliferation of luddites and science illiterates in government and media.
I've had lots of good times in the worlds of SF and it... annoys me... to see the hard work of the good ones devalued by association with sloppy wannabes.
Sloppiness is a cardinal sin.