One of the best movies that I think captures a real potential future (besides the killer robot stuff) is I, Robot starring Will Smith. The timelines may be off, but many of the concepts are relatively well flushed out.
I re-watched it earlier this week after playing with Siri just to see how it compared with the AI in the movie called Viki.
It is startling to see just how similar the two AIs are. Perhaps the Apple engineers were inspired by the movie. But I’m finding the whole concept of voice commanded intelligent interfaces fascinating now that Apple produced one that’s actually useful.