Curved mirrors. So not movie holograms; you can't put anything behind the projections. That makes the illusion very fragile at some touch surfaces. The sensatio

Curved mirrors. So not movie holograms; you can't put anything behind the projections. That makes the illusion very fragile at some touch surfaces. The sensation technology has the same projective limitation, so you can't have anything else opposite to your hand. Together, they could give a reasonable hemisphere of touch and sight. However, the touch technology is separate and will work with any hologram in a controlled space.