Virtual reality has improved significantly over the last couple of years. At the same time prices have dropped.
Virtual reality can be used for training, product demonstration, games, education and various other applications.
Aperify develops virtual reality for mobile devices and head mounted displays like HTC Vive and augmented reality for mobile devices.
Get inspiration for endless possibilities here:
https://www.vive.com/us/product/vive-virtual-reality-system/
https://vr.google.com/cardboard/
https://www.wareable.com/google/the-best-google-cardboard-apps
https://vr.google.com/earth/