I assume a waiter/waitress would still be involved to bring the food to your table or refill drinks.
if not, you may as well just go to a cafeteria or take-out restaurant.
Your servers will just be bringing food/drink to your table. If you need another drink during the meal, just reach over, and order another one on the ipad. Saves having to track down your waiter for another drink, or even to get the bill.