Rollable transparent OLED
OLEDs can be made flexible, or transparent. In the future we might see an OLED displays that is actually rollable. So maybe you could just roll it when you want to watch some TV, and then remove it when not needed. Or perhaps the OLEDs will be so thin and transparent that they will just be invisible when not in use - you'll just see the bare wall, but when lit up, it'll display your TV picture.
Nothing says "future" quite like a rollable display. Today Sony's giving us a glimpse into what will one day be with its 80µm-thick organic TFT-driven OLED display. The 4.1-inch display integrates Sony organic thin-film transistors and OLED technology onto a flexible 20µm substrate lacking any rigid driver IC chips. As such it can be wrapped around a cylinder with a 4-mm minimum radius. Display specs include a 432 x 240 pixel resolution (121ppi) supporting 16M colors while exceeding 100nits brightness and a 1,000:1 contrast. It's still research, but it's clearly advancing towards product... someday. See it in action after the break. 
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