I love the idea of change but somehow think that things will go slower than perhaps suggested. Many people are not that eager to move away from fiat and the traditional banking system. Same goes for businesses. So the realistic scenario is probably a further development (and growth) of the cryptocurrency scene - with bubbles and busts and all - and a traditional sector slowly moving towards applications of cryptocurrency and other blockchains applications. In the end, it will probably merge together beautifully.

And yes, centralised control will probably suffer.