I don't see it at all. There is no bank service that I can think of that I wouldn't pay money to avoid.

Loans? So much easier to go with crowdsourcing.
Money transfers? already on the blockchain
Escrow? sorta on the blockchain / will be solid soon.
Investment service? Do you still have any trust in a bank?
Home loans? This will be the biggest shift. As in house prices will fall to $0.

ATM? Right up till the time bitcoin breaks the physical/electronic barrier

I'm not seeing any need for a bank. What other service can they provide?