Have you ever seen Total Recall, Minority Report, A Scanner Darkly, or Blade Runner? Those are all based on stories he wrote.
Very loosely, in most cases. And a number of other films as well, including Paycheck and Next:
http://www.imdb.com/name/nm0001140/
It's amazing how popular the guy's work is in Hollywood, considering what weird, freaky stuff he wrote. But Hollywood likes to imitate, so I guess they figured that if this guy's work resulted in Blade Runner and Total Recall, it was worth mining further. (BR actually didn't do well at the box office, but it was critically well-received and found success on home video.)