I am loving the QR menus, especially ones that offer check out. For one thing, I almost always feel compelled to go wash my hands after ordering, since menus are known to be some of the most germ ridden things out there. Besides that though, restaurants could do some many cool things with this. For example, it would be trivial to offer photos of every dish. The next level could be item-item recommendations (people who order X, also like Y).