They don't take their idea far enough.
You can remove representational democracy and voting from the core. Instead replacing it with independent policymaking and voluntary agreements of smart contracts, you implicitly 'vote' by your use of a contract. Common Law in a real sense becomes the most popular contracts for any given period.
One-size-fits all policies won't be a thing in the future and we will have very different cultures operating under very different laws occupying the same physical space.
It's not about utopia but it certainly makes things far more liquid, transparent and cryptographically secure (unbreakable promises). It opens governance right up for innovation so we can at least iterate faster in a voluntary manner.