It's often difficult to describe the experience of putting on a VR headset. Standard Trailers don't do it justice and you can't really get it until you try it.
But you can at least get a better sense of how it feels with 360 degrees video like the one just release for SuperHyperCube.
Using your mouse or your smart device, you'll be able to move around getting a better idea of the tracking that comes with VR headsets and how it affects your perception.
SuperHyperCube is a puzzler in which you must align shapes with outlines that appears from far away. Tiltiing your head and body, you'll be able to take a peek at the next one and prepare accordingly.