“The future is already here — it's just not very evenly distributed.”
He is reported to have first said this in an interview on Fresh Air, NPR (31 August 1993) { unverified http://www.npr.org/templates/story/story.php?storyId=1107153}, he repeated it, prefacing it with "As I've said many times…" in "The Science in Science Fiction" on Talk of the Nation, NPR (30 November 1999, Timecode 11:55) http://www.npr.org/templates/story/story.php?storyId=1067220. See also The future has arrived... - Quote Investigator http://quoteinvestigator.com/2012/01/24/future-has-arrived/.