You forgot to mention what those
5 ways are:
1. Clearing and Settlement
2. Payments
3. Trade finance
4. Identity
5. Syndicated loans
Most ways are obvious, but I wouldn't want to use any bank that uses #4:
Dozens of start-ups are working on building blockchain systems for customer identification, including Cambridge Blockchain, Tradle, Credits and Blockstack.
This would mean my personal information is stored forever, which isn't allowed by privacy regulations anyway.