Six degrees of freedom “6Dof” means that you will feel the same sensations as in the real world. In a photorealistic scenario.
Sizes, distances, volumetry in general will be the same.
The perception will be ortho stereoscopic and with a sense of parallax.
You will be able to walk within a sequence of photos, feeling that the environment moves with absolute naturalness around you. You will feel so immersed that your mind will believe you are there.