Star Wars was basically a Western, but it pretty much ruined science fiction movies for twenty years. Hollywood (which wasn't much for good sci-fi anyway) decided that all you needed for science fiction was to spend all the money on special effects, and don't worry about plot.

Metropolis had wondrous special effects (they still hang in there 80 years later!), but had a plot--A confusing plot I admit, but a plot.

For science fiction, I still maintain the best actual science fiction movie (as opposed to a story with ray guns and rocket ships) was "The Day the Earth Stood Still.". But I did vote for Metropolis!
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Mike B in OKlahoma

"Never confuse with malice that which is adequately explained by incompetence."