I don't think DFW set out purposefully to write a technically accurate prophetic piece of science-fiction in the way Clark or Asimov did, he wrote out of the typical literary author's urge to clear away an individual's crushing existential dread.
What's amazing is technology in American(or O.N.A.N) culture is presented as the cure for existential dread, so the technology itself is a like a literary character, it's almost the antagonist.