So, with your headset on, you experienced the diorama! It appeared 3D, it felt 3D, and maybe you even had a sense of actually being there inside the synthetic scene. I suspect that this isn't the first time you've experienced VR, but now that we've done it together, let's take a few minutes to talk about how it works.
The strikingly obvious thing is, VR looks and feels really cool! But why?
Immersion and presence are the two words used to describe the quality of a VR experience. The Holy Grail is to increase both to the point where it seems so real, you forget you're in a virtual world. Immersion is the result of emulating the sensory inputs that your body receives (visual, auditory, motor, and so on). This can be explained technically. Presence is the visceral feeling that you get being transported there—a deep emotional or intuitive feeling. You can say that immersion is the science of VR, and presence is the art. And that, my friend, is cool.