I saw a new demo for the Oculus Rift today called
Lucid Dreams v2. What really caught my eye was that along with the very lovely eye candy, this demo had controls for ICD, Inter-Camera Distance. For a great explanation of how that works, see this
XKCD comic. Basically, the higher the ICD, the farther your eyes are apart and you are "bigger". Vice-versa for a low ICD.
I plugged in my Rift Dev Kit and took some screenshots at different ICDs. If you've got the eye muscles to do it, you can cross/relax your eyes and see the following images in 3D sort of like those magic eye pictures.
Stills are great, but they do NO justice to the sense of scale that is achieved. When I had the ICD up and walked around the models they looked like tiny dolls. When I had it all the way down the models become towering giantesses. Tapping the ICD hotkeys let me watch these women suddenly grow and shrink. (Or feel myself do the same, depending on how you look at it) It was an amazing experience. I can't wait to see what happens in the next couple years as VR explodes.