Robots are already replacing workers in certain restaurants. Sally from Chowbotics can potentially take even more jobs away from humans. This is a smart robotic system that makes custom salads for customers. It has a touchscreen interface that allows customers to make their choice. The robot also lets them know how many calories there are in their salad.
Sally uses smart sensors to detect how much of what it has. It also uses a weight sensor to dispense the right amount of each ingredient. TechCrunch has shared more on it here.