The novels and stories of the late Philip K. Dick have already provided the basis for eight movies, some of them very good ("Blade Runner," "Minority Report"), some so-so at best ("Imposter," "Paycheck"), and at least one of them godawful ("Screamers").
The filmmakers based the movie on a short story, "The Golden Man," by Hollywood's favorite sci-fi writer, the late Philip K. Dick ("Blade Runner," "Total Recall," "Screamers," "Minority Report," "Scanner Darkly"), but beyond the basic idea, they didn't appear to do much with it except turn it into one long chase.