The idea of "private blockchains" and without the use of Proof of Work was not so smart to begin with. How could their private blockchain make things more efficient for them? Is it not that their current system is good enough for what they are trying to do? Why don't the banks use a shared database? That would be much easier for them. I believe there are groups of individuals who are scamming to make the banks ride the blockchain band wagon.
A blockchain for banks is nothing but hype.
Well when R3 joined hyperledger and several banks area also part of hyperledger, there is no need to be with R3 anymore I guess.
And banks still like the idea of blockchain or distributed ledgers because they may improve their inner processes and operations with it.I'm speaking of increase of speed, cutting costs and circumvent other middle man.
This is nothing the average bank customer may have any advantage from of course.For them I think Bitcoin and other open decentralized Blockchains secured and supported by many nodes and miners around the world will still be the main choice.