In order to achieve this, the user may be provided with either a very large (or wraparound) screen, or small displays mounted directly in front of the eyes. The latter provides a particularly convincing 3D sensation. The movements of the user’s head must be sensed, and the camera must mimic those movements accurately and in real-time. This is important to prevent unintended motion sickness.
Another source of future improvement to telepresence displays, compared by some to holograms, is a projected display technology featuring life-sized imagery
Sound is generally the easiest sensation to implement with high fidelity, based on the foundational telephone technology dating back more than 130 years. Very high-fidelity sound equipment has also been available for a considerable period of time, with the stereophonic sound being more convincing than monaural sound.