This is a video demonstration of the 'No-Logram' system developed by artist Joanie Lemercier. It uses high powered video projectors and a mist of fine water particles sprayed from custom nozzles to display dynamic 3-D images. It also uses "depth sensors and image analysis of a live video feed to track a user's movements." In the video, you can see Lemercier changing the size of objects by moving his hands, and a ghostly image of himself mirroring his movement. Pretty neat, I want one of these to help scare my roommate (one of my few joys in life). I'm thinking I'll pretend like the ghost of the person who died in our apartment has returned and wants their old room back. "Sounds complicated. And expensive." Plan B: scary witch mask and a meat cleaver.
Keep going for the video.
Thanks to LB, who's confused how you could demo a system like this without including a Princess Leia scene.