Have you tried 3D glasses in big movie theaters like IMAX? Or watch a movie like Avatar or Jurassic Park (re-released 3D edition of the 1993 movie) on a good 3D TV. You should see the 3D effect there.
But some people only see 2D, e.g. with only one eye or eye-problems.
3D IMAX does the trick, i can really see the 3D effect and i find it very impressive. 3D movies like Avatar do not work so well though, it gives me the impression of having several 2D layers instead of actual 3D effect (it lacks depth, again). But Oculus is even worse than that, I don't see any 3D effect at all.
