Specifically, a hospital in England has been using Wii Fit sessions as a way to help people learn how to make use of prosthetic limbs, claiming that the balance board helps people understand how to control a replacement limb better and retain balance. This certainly seems like a unique approach to physical therapy, but one that makes sense. Hand-eye coordination improvement and video game use have gone together for a long time, according to many sources, and using video games would certainly be a more engaging way to train people.
While this may be limited to a single hospital at the moment, it wouldn't be surprising in the least to see similar endeavors all over the world. Every generation of video games has become more interactive and more engaging. Perhaps the stereotype of gamers as unfit will be dispelled because of this.