This is huge! What a way to modernise a system - start with the currency. They will realise benefits rather quickly and that will encourage other countries to do the same. You're right, Eth will benefit hugely as well. R&D cannot be done within the banking system as easily as it can on the public blockchain. Anyone wanting to get a piece of the massive move will be doing development and testing on the public Eth blockchain. We're on a wave of adoption and it keeps growing.