Good on em. I used to work for an E La Carte competitor that used iPads instead of Android devices, and it's a tough market right now.
There exists a lot of resistance from the waitstaff who see tabletop devices as job killers, and customers are pretty much divided down the middle (they either love em or hate em). It seems like dining was always going to trend towards something like this, it was just a matter of when. Restaurants are pretty old in their way of thinking, and it's quite the accomplishment to get 100k devices on tables.