Kenneth's post reminds me of a conversation I once had with Robert Nozick. I was at a week-long conference that Nozick happened to be at. Pete Boettke and I were sitting at lunch with Nozick one day and finally Pete asks, "Have you ever seen 'The Matrix'?" And Nozick says, "No, why?" And Pete proceeds to explain how the Matrix is essentially Nozick's experience machine from Anarchy, State, and Utopia made into a movie. I don't know whether Nozick ever ended up seeing the movie, but he did seem intrigued (I have no idea whether the makers of The Matrix had read Nozick).
As an aside, Nozick struck me as probably the smartest person I ever met. Utterly brilliant.