I found two interesting pieces of art that use the Kinect. Encounter, which is a robotic arm where a mirror is attached, is a robot that senses the position of a person and has a "personality" in its movement depending on how long the person has been sensed (https://www.creativeapplications.net/openframeworks/encounter-suspiciously-curious-robotics/)

Fragments is a wall of square mirror slices that create a concave space where a person is looking, making the person's face/body reflect in a circle of mirrors (https://www.creativeapplications.net/objects/fragments-by-random-international-2016/)