If it turns out that it's actually possible to comfortable read information on these, which I find extremely hard to imagine, they would also be immensely helpful in the Emergency Room and the hospital, especially with facial recognition software. Being able to instantly see lab results/x-rays/patient data for any patient you're looking at, and being able to instantly look up things you don't know without having to lug around a stack of files or having to keep going back to the computer would save an incredible amount of time, and make it so much easier not to overlook critical information.

That said, the privacy implications are horrifying.