No, just no, this is just not going to happen
Like someone said on the first page, the world is ruled by bankers
Can you imagine what will happen to the stock market? To wall street?
Yup. Banks and the financial markets will no longer be able to counterfeit money. Too bad, so sad. Not.
BTW, stay away from blockchains controlled by a bank. Blockchains are distributed ledgers. If a blockchain does not have a lot of miners, it is not distributed. And the ones who control the blockchain controls the transactions. In other words, they can create a transaction that gives them a lot of money whenever they want. So don't fall for their hype.
This is why I can't no longer trust anything coming from Mike Hearn's mouth, since he went the R3 route. He is now part of the banking circles, and clearly not pro-decentralized Bitcoin, since they want centralized nodes basically.
As far as banks disappearing, I think we will see them disappearing in the classic form after some sort of war, since they will not give up easily (that assuming they don't smoothly adapt to the new paradigm).