Optical headsets have currently led the way in Virtual Reality - the success of Oculus Rift without it even being in consumers hands is testimony but reality cannot just be emulated just with good visual graphics alone. Impacto is a set of wearables that uses electrical muscle stimulation to give you the experience of interacting with physical objects. It is now just in demonstration phase with only the users arms being able to interact with virtual world but looks to expand to a full body sensory suit for interaction with the current visual VR tools.

See it here.