Virtual Reality is a great area to work in nowadays
The hardware and software for digital interaction and 3D graphics are affordable for normal consumers, thanks to developments in the gaming industry. These technologies can now be used on almost every computer system for a reasonable price, and new devices become available each year.
The difference between the “classical” domains image processing, virtual reality, computer graphics, photography, game development and video- and film productions gets more and more vague. For example in the film industry they make more and more use of VR-techniques like 3D stereoscopy and motion tracking.
VR can be best defined as giving an illusion of “being there”, of “presence” in a so called virtual environment. This VR-environment can be as diverse as the cockpit of an F16, the surface of a gold atom, a future building, or the inside of a coronary artery. It can be applied for training, in research (for visualizing complicated concepts), and in medical applications (for making better diagnoses, or being able to do better surgery), but also commercially (think about an architect who wants to let his clients walk around in their new home or office, before it is actually built). At the moment companies see more and more opportunities in the use of VR in product development.
Virtual reality(VR) is not just one single technology, but a whole collection of rapidly evolving techniques. Most VR systems use 3D computer graphics, real time simulation techniques and a broad range of input and output devices to create an illusion of actually being in a virtual environment.
An interesting website that describes the historical overview and gives an impression of VR can be found here: http://www.theverge.com/a/virtual-reality