Science fiction's not about the technology. It's about creating a hypothetical situation and using it to examine ourselves. In good sci-fi, the only technology that exists is there to mirror us. Look at Dune, the greatest sci-fi I've ever read, for the ultimate example: It deals with ecological scarcity, religious fanaticism, chemical addiction, and a plethora of other topics, and merges them all together to create the core universe in which it takes place. What makes it good is how every bit of information about the universe is relevant both to the plot and to the social issues it talks about.
We still have that today. The problem is it's been co-opted by "serious" writers who include Herbert and Dick as literary canon. Doris Lessing, Michael Cunningham, a slew more whose work is science fiction but for the fact that it bears about it the pretenses of more literate fiction, so that it's ignored by people looking for the low-fi attitude of earlier science fiction, before it was commonplace.