LG Display just unveiled a new, ultra-thin television screen that is less than one millimeter thick, at an industry event in its home country, Korea. LG's current thinnest TV screen is a 55-inch OLED panel that is 4.3 mm thick. So, four of these new screens stacked together are still thinner than LG's thinnest screen on the market. This new display won't be available in stores anytime soon. The design revealed in Seoul is a proof-of-concept showing that the technology is possible even though production costs may not be low enough to be practical, yet.