Augmented and mixed reality
In Augmented Reality the viewer can still see the environment around them but content powered by the headset - usually a 3D holographic model - is superimposed over their current surroundings.
In doing this, AR allows the user to walk around and interact with said model and analyse it from different angles or select specific areas with which to interact.
The user can be guided by voiceover located in the headset and only needs to use their hands and own body movements to control interactivity within the environment.
This is the very cutting edge of mixed reality technology and is incredibly intuitive.