Here at Engadget, we've covered our fair share of flexible and transparent displays. Small ones, slightly larger ones. But never one that measured 77 inches corner to corner. That particular milestone has now been broken by LG, with a new OLED panel that boasts an Ultra HD resolution of 3840x2160. It should be plenty sharp then, but also portable, given you can scrunch it up to a radius of 80mm without compromising any of its functionality. Neat. With a transparency level of 40 percent, it could also be used to replace windows and screens in a vehicle, storefront or home.