Yahoo has an article listing its “Top 10 Inaccurate Movies About the Future.” As nearly as I can tell, they’re basing inaccuracy entirely upon whether the movie’s events occurred by the time the movie predicted.

SOYLENT GREEN (1973)
According to this movie, the population of New York City in 2022 — a mere thirteen years from now — is somewhere around 40 million people, or three times the population of Mumbai. As of the 2000 census, the current population is around 8 million, so if this movie is going to approach anything close to reality, New Yorkers had better get busy.

To quote Inigo Montoya, “You keep using that word. I do not think it means what you think it means.”

Link (Hat tip to DaleB)