In the article developer said that his goal is to experiment with decentralized information system. I dont really understand why would bank want something like this. I mean goal of bank is to have things (your money) under control.
It's not that they will accept whatever decentralized incentive to incorporate it into their system with the consequences of handing over the power to the people. They are investigating the possibilities of having all benefits of the blockchain, but then without losing any control. That's why they invest many millions into having such a system developed.