I once gave a lecture where I used Tetris as metaphor to make a point about narrative and information processing. I regret to tell you, fellow kids, that none of the 100 or so students had heard of Tetris.
I make a Matrix reference in one of my lectures and it's simply now a fact of life that not one single student in any of my classes will ever have seen the Matrix. Zero, every time, no exceptions. Obviously I'm old and washed but damn