[jnbiche]

There will be (and is now) the possibility for a merchant to accept Bitcoin with 0 fees. These will be the merchants who are able set up open source payment processing system by themselves (or willing to pay someone to do this).

Others will pay a small fee for the convenient that a full-service solution provides. Right now, bitpay charges 0% and a small monthly fee for payment processing. To be honest, I see them staying with that business model, perhaps permanently.

If they or other incumbents start jacking up the fees, someone else will take their place. Bitcoin community is swarming with entrepreneurs.