But will it be a public ledger, can be mined publicly?
I just don't see how it is possible to create a private network and "mine" it.
Makes no sense.
Ripple is different though, as far as I understood. Ethereum has mining, and therefor is public?
Need to read up more on these things later tonight.
No, it wont be public nor will it be mined by the public.
It will save them money and time to confirm money transfers from bank A to bank B.
They will still charge you the same and it will probably take as long for you to "transfer" the money because it makes them more money.