FYI - the banks backing your credit cards are not owned, operated by, or affiliated with the Federal Reserve (which is the bank that handles the distribution of US currency). Similarly, any bank backing a Bitcoin-based credit card most likely will not be owned, operated by, or affiliated with this site or the creators of the Bitcoin software.
So basically - who knows? We have no say in that. We can support companies if they offer such a card (I believe there already are some doing something similar), but that's all we can do.
Also - a better option would be to put a Bitcoin client on a smartphone equipped with an NFC chip. This could be used to both send and receive payments from other mobile users quickly and easily.