Virtual Reality is placing a person (anything that can see – companies have created VR simulations for cows in Russia), into a virtual world, transporting them to a replica of a virtually captured real-world location, or a bespoke designed environment.
Virtual Reality is not only for entertainment and games, but is becoming widely adopted for realistic training and simulation. It is vastly cheaper to train users in VR than it is either on location, or with dangerous equipment.
Working with Liverpool John Moores University, and Birmingham City University for the creation of a VR training simulation for Radiotherapy nurses to increase staff retention.
You do not need an expensive headset. With the advances of web technologies, WebVR is a viable, and flexible alternative to a dedicated VR Application placed on a headset.