Science fiction movies, television shows, and books have had us drooling over holographic displays for decades now. The idea of having a three-dimensional display being projected in real space is an alluring one. Unfortunately, nobody has quite figured how to achieve that in a practical way. The closest we’ve come are 3D TVs and volumetric displays. But YouTuber JLaservideo has devised a method for projecting a holographic display from a watch—and it even mostly fits on a wrist!