Not to stray too far off topic, but I thought I read somewhere late last year that there is actually a Blade Runner sequel in the works based on the first sequel book, The Edge of Human. And Ridley Scott is involved with it too.

And given how much American loves sequels with new special effects, extra sex/violence/gore, and new & young actors, I wouldn't be surprised if there wasn't someday a sequel to Close Encounters. Dreyfuss just doesn't appeal to the American-Idol watching teeny-boppers the same way.