So you think the banks will absorb the Apple see even if it's a net profit to the banks? I am not so sure about that. I think even so the fee will be passed down the chain to the customers.
http://bankinnovation.net/2014/09/apple-said-to-negotiate-deep-payments-discounts-from-big-banks/
[...]Apple has also managed to bump down the actual card present rate by 15 to 25 basis points, according to people with knowledge of the talks.
A basis point is 1/100 of 1%, or 0.01%. So, on a $100 transaction, Apple would be able to collect 15-25 cents, out of the card processor's merchant fee (which remains unchanged). Multiply that by all the transactions handled by the iPhone 6 (and beyond), and it will be a significant amount, especially if this is expanded world-wide.