Just skimming through these while list current applications of virtual reality in practice. These look amazing though I’m not sure I’d volunteer to test “Spider-World” (which means of course I’m a good candidate for it.)
Hoffman, Hunter G. “Virtual-Reality Therapy.” Scientific American 291, no. 2 (2004): 58-65. [HTML version]North, Max M., Sarah M. North, and Joseph R. Coble. “Virtual Reality Therapy: An Effective Treatment for Psychological Disorders.” In Handbook of Virtual Environments : Design, Implementation, and Applications, ed. Kay M. Stanney, 1065-1078. Mahwah, NJ: Lawrence Erlbaum Associates, 2002.
Rizzo, Albert A., J. Galen Buckwalter, and Cheryl van der Zaag. “Virtual Environment Applications in Clinical Neuropsychology.” In Handbook of Virtual Environments : Design, Implementation, and Applications, ed. Kay M. Stanney, 1027-1064. Mahwah, NJ: Lawrence Erlbaum Associates, 2002.