QR codes for payment are cool. The rest of the service is the same, you get a menu and people take your order and bring things out to you, but you pay via a QR code and your table number so you don't have to flag anyone down. And it's pretty easy to integrate online ordering, for those that want that.
There are chain places that do this. They even accepted remote ordering and payment, so like you could buy stuff for someone else's table without even being there. You could stan a local DJ and tip them fries. Or peas. For some reason, it was always peas.