There is much more to these decentralized names. There is a W3C community group working on decentralized identifiers (DIDs), the DID foundation, the reboot web of trust events,..
You can find 24+ different decentralized identity providers already. See the w3c registry: https://w3c-ccg.github.io/did-method-registry/#the-registry
I would say blockstack.org is one of the leading players in the decentralized domain name system.
Thanks for the info @friedger. The 24+ DIDs are provisional, which means they are not available yet.