The best example of MovieOS has to be in Superman 3 - the one where this guy (Richard Pryor) is supposed to be a l33t hax0r. He is apparently able to make the computer do something it has never done before. Then we get to see the screen - and all the program does is lists itself, followed by about 20 PRINT statements. In BASIC code.

And don't even get me started on Hackers.