As far as I can tell, there is no technological aspect here. It doesn't offer any solution to providing decentralised, unique identity. It just points out systems with central authority that provide unique identity, and the blockchain, which provides distributed identity verification without ensuring any unbreakable connection between one person and one identity. Then it seems to indicate that the two should somehow be mashed together to create distributed, unique identities, without explaining how.

I don't see how it would be possible to prevent a single person from creating multiple identities in a distributed system.