The Shirai Lab at the Kanagawa Institute of Technology have developed a way to simultaneously display 2D and 3D video on the same screen without producing a blurry double image. The technology is called 2x3D or Scritter.
A few years ago we saw a View-Master that was upgraded with digital picture frame displays. Alec Smecher took the classic toy to the next logical progression. He bought a very old model of the View-Master and installed a pair of 0.9″ 96 x 64 OLED displays, a Raspberry Pi and a laptop CD-ROM drive on it.