Why bother? It's not like BTC is even that useful in retail. Let it first prove itself by conquering the international remittances market and e-commerce.
Why is it not useful in retail? I love the idea of not having to depend on a credit card company to buy simple, cheap items. If I can just scan a QR code and pay directly that sounds so much easier and convenient.
since entering your debit pin takes too much effort? haha just kidding..