The greatest UI in the history of films cannot be captured visually: it is the UI in Spike Jonze's "Her". The second greatest, though, is quite visual: the interface in Minority Report. I wish I could find the interviews with the UI engineers who talked about the influences that went into it.
These are great 'low tech' interfaces. Now if you want a great 'advanced' interface think anything in the Cyberpunk genre, hard to beat direct brain interactions. Who needs clumsy words and floating pictures :)
What is the nature of the thought you want to transmit? How do you make sure that you are not transmitting idle day dreams? How can you be sufficiently precise for a computer?
Remember Firefox (Clint Eastwood movie) where you have to think in Russian to launch the weapons (spoiler!). Well, suppose you casually "thought" the word "shoot" or "fire" or whatever the Russian equivalent is?
Suppose your friend -- Maverick -- is goofing around with you and you're both in an inverted dive and you just think. "Oh that guy. Sometimes, I just want to launch at him."
The best way to interface is with language! You should have to say the command out loud or to type it out. That way you are being precise and deliberate.
Of course, it would be even better if you have a specialized language that was free of the ambiguity of human speech...