They have been researching Ripple blockchain technology which they can run from their own central servers. It doesn't need any decentralized miners. They have also been researching Bitcoin blockchain technology, and probably other blockchain technologies like Ethereum's. If they do start using blockchain technology they will probably try to create their own centralized bankers coin. Whether it works or not remains to be seen. They won't give up all their lucrative means of making profits through bank transfers without a fight.
It will work, but it will be completely centralized and because of this, prone to failure and manipulations. This is nothing huge in my opinion, their own centralized blockchain. They could have developed this years ago. I think they are just trying to build upon recognition of Bitcoin, they will even market it "safe as Bitcoin but without bad Bitcoin stuff", you'll see.
This is in my opinion as well a way to fight Bitcoin back. They have recognized dangers of Bitcoin for their banking systems, don't worry about it and this is the best they could think of to fight back!