17 cool gadgets that tease the future

LG Display -- the research arm of LG Electronics -- unveiled a prototype of its latest rolling screen technology.

The 4K OLED display resembles a normal TV screen, but the back has small vertical slats which let it roll up around a metal base. You can lower the screen into a box by pressing a button.

But such displays won't be in electronics stores anytime soon. The company sells the tech directly to display manufacturers, which may or may not use it for their own devices.