"But how far will disruptive effects reach? Are we rapidly approaching a singularity where, thanks to Bitcoin-like tools, centralised power of any kind will seem as archaic as the feudal system?"
I loved the article.
To say "centralised power of any kind will seem archaic" is a bit of a stretch. The NFL (for example) is an example of acceptable central power. When you own/buy a team you agree to obey the rules of the league and the commissioner has power to enforce the rules.
That's not power. It is consensus. The two are fundamentally different.