Financial institutions will use R3. "R3 is an alliance of the world’s largest insitutions, with a mission to realise the benefits of distributed ledger technology." They will not use a blockchain with mining. They want to use a distributed ledger in which if party A-B have a transaction, the pertinent information is only available to A and B and possibly government regulators.

I think the distributed ledger will take over (R3, Hyperledger, Ripple), noone is going to take mining based blockchains seriously in a few years.