Did a hackday on that focused on a non-gaming VR solution, and while I can't say what that was, I will point out two previous training related uses:

In 2001/2002 they trained surgeons with it and found significant improvements:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1422600/

Siemens has done training for Oil Rig crews while the rig was being constructed. Reduced real world training times:

http://www.siemens.com/innovation/en/home/pictures-of-the-fu...