Virtual Reality can be used for immersing yourself in a computer generated environment, this can be used for various forms of simulations and entertainment. Here are a few examples:
Virtual Reality is a fully computer generated environment that gives you an immersive experience of being in that environment. Immersion into virtual reality is a perception of being physically present in a non-physical world. The perception is created by surrounding the user of the VR system in images, sound, or other stimuli that provide an engrossing total environment.