I just came out of a screening of Lo and Behold: Reveries of the connected world , a documentary by Werner Herzog about the past, present and future of the internet (very recommended indeed.) One of the interviewees is Lawrence Krauss who remarks how eerie is that, among all the things predicted by science fiction, internet was missing. I think he meant to say that internet didn't became a staple of science fiction as other futuristic inventions like humanoid robots, flying cars and interstellar vehicles did. There are a couple of stories that mention inventions that convincingly mimic today's internet (see this other post), but they are relatively spare. I cannot think of a single well-known story in which an internet-like technology is central to the plot.
Is there a good reason why the community of science fiction writers never saw the advent of the internet or at least never grew interested on it? What about writers that deal with more psychological or philosophical question in their science fiction? Quotations and specific references are highly appreciated.
Note: You can also disproves Krauss's claim, but, please, support appropriately your answer.