I'll have to stand behind said idiot while they try to figure out what buttons to push
Kiosks are cheaper than employees and are "always on". They don't take breaks, they don't call in sick, and their shift doesn't end at 8pm. So instead of standing in line waiting for one human order taker, you will have a choice of six or eight kiosks. If you are there in the middle of the lunch hour rush, when all the kiosks are busy, then you can order on your cellphone. Even better, you can order, and pay, on your cell before you arrive, so your order is ready for pickup when you arrive.
After auto-ordering is established, the fast food joints can change their drive-through-window policy to be pre-order only. So you pre-order, and pre-pay, on your cell, get a beep when your order is ready, then pull up, grab your bag, and go. The transaction time will be reduced from minutes to seconds, saving people time, and most likely boosting business for the restaurants.