Very interesting. Goes back to the essence of the importance of the blockchain technology.
He is one of the leaders in this space. Also some good stuff about wisdom of the crowd and how to run an organisation.
And regarding his question, has someone already started to build a blockchain to store actual properties in. Killer app!
NuBits/Peershares made a first step with the shares. Why not make a Peershares implementation for storing properties and proving and exchanging ownership? I would be your first investor