With no charge-backs it has less of a cost to accept bitcoin than credit cards so places could offer a slight discount for it to entice consumers to use bitcoin.
No chargeback is a bad thing for consumers who loose the safety credit cards offer. If consumers prefer the safety of credit cards then the merchants will ignore bitcoin.
Bitcoin must offer something that benefit people before they want to use it. No such benefit exist today and therefore there is no interest in bitcoin.
What is a credit card? It's a payment processor for fiat transactions. Well then there will be payment processors for bitcoin transactions much like bitpay that can offer protection against this.