Virtual reality is a user interface that involves real-time simulation and interactions through sensory channels to immerse users in virtual environments. It has its origins in flight simulators from the 1950s and early prototypes in the 1960s, with commercial development beginning in the late 1980s. Current applications of VR include movies, video games, and education/training. Emerging technologies like Project Natal, CAVE systems, and the Nintendo Wii are pushing the boundaries of VR by enabling more natural physical interaction. While the future is uncertain, VR is expected to continue evolving entertainment and other industries through immersive experiences.