This has been done to a degree, and it failed pretty quickly, faster than most. uWink opened a restaurant in Mountain View with tablets for ordering food and playing games while you wait.
The tablets had menu items complete with photos, reviews, and it took about 15 minutes for the food to arrive to your table. Typically the waitstaff would only bring you your drinks and food. The Mountain View location of uWink was open for less than a year.. about 9 months, so you can all guess how well that went. Most restaurants, even terrible ones, managed to stay open for more than that!