It doesn't matter if it is a little inconvenient. If it saves the company money they will do it. They can also lower the price of their products because of automation which will actually make customers a lot happier than some cashier.
I just explained you that it won't make them save much since they need cashiers to help the people on the self check-out counters, and that removing the cashier lanes would kill business for them. In other words, not much changes for the stores themselves financially speaking.
But all that has nothing to do with the topic at hand, so I suggest we'll leave it at that.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454