Sure, we all log on to our online bank accounts, but they don't really let you take your money anywhere. Ripple will be supported by a rapidly expanding network of Gateways that will allow you to get money from your bank account onto the Ripple network, and from there, an unlimited number of financial options will be available to you.
You'll be able to spend your money with any merchant with a ripple account or with a bank account tied to a Gateway. You'll be able to exchange your currency for USD/EUR/CAD/GBP/JPY/BTC/whatever you want.
We'll finally be done with the archaic ACH network. $50 bank wire fees and 3% currency conversion fees will cease to exist. We have an Internet, why not use it to move money?