Roberta,
Here's a few:
The Terminator
Blade Runner
Philadelphia Experiment 2
Chris Marker's 1968 "La Jetee"
Road Warrior Trilogy
Lang's Metropolis
 
You also may want to check out Vivian Sobchack's "Screening Space" and the
Camera Obscura issue on SCi-Fi which has several articles on utopic/dystopic
comparisons.
Good Luck