Dreams provide us with a kind of virtual reality , one in which simulations of all of the physical senses can potentially play a part. Also, our dream life both reflects and incorporates elements of our waking experience - so much so that our dreams today in many ways differ greatly from that of earlier generations. Movies and television have allowed us to vicariously experience everything from baking cookies to exploring distant galaxies, and we have incorporated these experiences into our dreams. Still, however hypnotic, these light and sound productions seem rather crude, and viewers must willingly “suspend disbelief” to experience the full effect. Once perfected, virtual reality may become perceptually indistinguishable from ‘physical reality’, or may even credibly simulate the experiences of the most fantastic dreams.