This is actually one of the few uses I know of that I have a lot of hope for. I worked on a digital voting system in college a decade ago, we were researching accessibility concerns mainly related to visually impaired voters. The voting industry in the US is just as much of a tire fire now as it was then but it could easily be improved.

A blockchain based voting system with each state acting as a PoW validator could actually work. The main challenge is how to centralize key distribution in a way that is accessible to everyone without compromising anonymity. If anyone knows your public key they know exactly who you voted for in every election.