I saw this thing in a restaurant bathroom for the very first time the other day, and I'm honestly shocked that they're not everywhere.
This seems like such a no-brainer. Nobody wants to touch the doorknob of a public restroom after washing their hands. I'm sure there's also a huge percentage of the population that has serious anxiety about it.
It worked fairly well in my first-ever field test, although I could definitely envision it being difficult for some people to use with a heavy door.