"Blockchain interoperability" sounds a lot like sidechains (http://media.rsk.co/sidechains-drivechains-and-rsk-2-way-peg-design/ http://media.rsk.co/sidechains-

"Blockchain interoperability" sounds a lot like sidechains (http://media.rsk.co/sidechains-drivechains-and-rsk-2-way-peg-design/ http://media.rsk.co/sidechains-drivechains-and-rsk-2-way-peg...). I agree that there will be lots of 'blockchains', but there will still be some hierarchical topology based on the tradeoffs that have to be made regarding trust/risk and liquidity of when & where your tokens are 'located'. The internet isn't possible without address space administration (even in the case of IPv6?). It appears to live at the edges, but there's still a hierarchy. And I can't imagine, at least with today's tech, how expensive it would be to have to speculate on N tokens across N blockchains to form a transaction, so I expect to keep things relatively useful, there will still have to be a singular source of truth for a given token.