Since the advent of high speed computers and fabulous graphics, virtual reality became a force to contend with.  But what is virtual reality? Basically, virtual reality means computer-simulated environments. The user feels as if he is in an actual place, doing actual tasks, when in real-reality he is just sitting in front of a computer screen. This idea was highly popularized in the hit movie Matrix, where an entire population was hooked up to a giant computer and made to believe they were living their lives, when the truth was they were donating their electricity to power the machines that had taken over the world.

There are many uses today for virtual reality, aside from making interesting and complex film plots. The vast majority of virtual reality experiences rely primarily on the visual sense, and to a certain extent the sense of hearing. The scene is broadcast to the user via a computer screen, or special glasses. There are some virtual reality experiences that do incorporate other senses. Multimodal devices, such as a wired glove or treadmills which are omnidirectional can enhance the virtual reality experience by encompassing more of the sensory input of the user.