I completely agree with this statement.  Although I think it's a bit of a reach (okay more than a bit of a reach) to think Bitcoin would replace the dollar or any other national currency, I do think it has opened a Pandora's box of sorts that will never be closed again.  I think that possibility of it replacing high-fee electronic transfer systems is more likely, as is those systems trying to implement Bitcoin in a way that is more beneficial to them than working with the traditional banks.  I think this could be the case for Paypal, Western Union, and other similar companies who have already expressed at least some interest.