But for any other usage, it cannot work, blockchain are useless. Someone or something somewhere has to make sure either that what's written on the blockchain corresponds to the real world, or to make the real worlds corresponds to what's written on the blockchain. Either way you need to have a kind of central authority, or at least trusted third parties. And that means you don't actually need a blockchain in the first place. We have better, more secured, more efficient, less costly alternatives to using a blockchain.
Back to name resolutions.
Virtually no one is going to actually host locally the blockchain where all names are stored. That would be way too big and could only get bigger and bigger, as a blockchain stores transactions (i.e., diffs) rather than current state. So in practice people and their devices would ask resolvers, just like they currently do with DNS. These resolvers would need to keep a database of the state of all names up-to-date because querying a blockchain is way too inefficient, running such a resolvers would be a lot more costly than running a DNS servers so there would be less of them. Here we just lost decentralization which was the point of the system. But that's just a technical problem. There is more: what if someone gets a name and we as a society (i.e., justice, whatever) decides that they should not be in control of it? Either we are able to enforce this decision and it means the system is not actually decentralized (so, we don't need a blockchain), or we can't, and that's a problem. What if a private key is lost, the associated names are gone forever? What if your private key is leaked by mistake and someone hostile take control of your name?
Using a blockchain for names resolution doesn't actually work, not for a human society.
