Things that matter outside of defi

from the first day, the vision behind Ethereum was to open the door for decentralizing far more than just finance. And indeed, there are far more things in the world than just finance that are worth decentralizing. But especially as the technology to resolve long-standing scaling challenges finally approaches, it's time to move beyond slogans and try to implement our ideals in reality. What are some concrete areas aside from finance where there's a clear case for what makes sense to build, that people will actually use? And what do we need to do more of to get started?