Customer would love to pay with bitcoin because they could simply scan the. Qr code and pay the bill instantly that would a wise use of bitcoin and that would reduce the burden of transaction fees and other factors. It would also promote and popularize bitcoin without any extra money and also it will introduce new technology to the world.
That's useful for them if they will make the right way to study bitcoin and if most of the merchants will adopt with bitcoin. I hope in the future we can see massive adoption so people will also experience the convenience in shopping not just online but also in the physical store.