People have known about the holographic projection technology in sci-fi movies like Iron Man and Blade Runner. In the movie, the virtual image changes as the characters’ fingers wave and move at will. Holographic projection technology, which is available now, enables humans to operate a computer without contact, much like motion-sensing in the movie. People can browse the web, read articles, play music, even cut fruit with the wave of a finger. Holographic image allows naked eyes to view and interact. This technology will revolutionize many fields in the coming years, including medical imaging, social contacts, 3D design, advertising, memory storage, entertainment, drug design, education, and so on.