If I understand part of Ripple's plan is to provide banks with the ability to easily settle debts internationally. I don't see a reason why a bank would use Bitcoin.

bitmesh might be a way for bitcoin to get larger adoption. It seems to me like having a micropayment transaction every 5 seconds as their current video suggests isn't doable at bitcoins transaction fees. Doing it in Ethereum where it's possible to put money into escrow might make more sense.

Ethereum also has decent business models with Augur and Proveance that have the possibility to provide value that people can't get easily outside of crypto-currencies.