It's a blanket technology allowing you to do any authentication model. It's supported by Chrome & FF, so the standard won't break anytime soon.
You'll need someone to build out the web app (like me) and then the app can get pushed easily.
After that, a simple but modern browser locked into a kiosk mode should do it. Then I'd seriously consider reducing updates to zero by limiting the kiosk to only your server's domain.
Yes, it could break. Anything can, but this gives you control over the:
- updates (since you control the app it connects to)
- privacy (doubtful you can trust data mining in a medical facility)
And that's compelling.