Neat idea, but I don't see it going anywhere until it's integrated with their cash registers.
It is easier than the cash register.
My wife has it set up in her store. She uses the cash register to get the price (actually she usually just uses a calculator because the cash register is too complicated for her), then puts the total into her phone app.
And that is it. The buyer pays and she gets the Bitcoins (or gets paid in dollars if she wants).