I've been to a couple of places that use these and I haven't seen any reduction in wait staff. One of my favorite hamburger places (Stacked) is new and is built

I've been to a couple of places that use these and I haven't seen any reduction in wait staff. One of my favorite hamburger places (Stacked) is new and is built on having ipad menus, even they have tons of waitresses on hand to help with people who have a hard time with the menu or to grab drink refills. They could easily do refills through the ipad but don't, I think on purpose so it forces interaction with the waiter. That will change over time I'd imagine but for now the hands on approach is probably ingrained enough in the customer base you have to people around.