I found this letter that Philip K. Dick supposedly wrote to Jeff Walker (a studio exec, I think?) in 1981 after viewing a TV interview with Harrison Ford regarding the release of the film Blade Runner. I found the letter on several other websites and it seems to be authentic (but you never know). In it, Dick agrees with Ford's points, saying that the "futurism" concept that the film lays out is more reality driven than sci-fi or escapism. The link has Dick's typed letter and a transcription below it which is easier to read.