I happened to notice that Dilbert artist Scott Adams mentioned Hitchhikers Guide in his blog recently:
His point was that humor based on reality is more popular now than it used to be. His example:
"The reality-as-humor trend is a fairly recent phenomenon, at least in its fullness. In my opinion, Douglas Adams' Hitchhikers Guide to the Galaxy series wouldn't have been successful if it came out today. In its time, it was a treasure. Society's notion of humor evolves."
The whole entry here:http://www.dilbert.com/blog/entry/scan_or_pat_down/
Actually, I don't agree. Hitchhikers Guide was very much based on notions of reality.