Invisible TVs

"Samsung's new TVs are almost invisible":

Samsung's new QLED line of 4K TVs features a technology the company is calling "Ambient Mode." Before you mount the TV, you'll snap a picture of the wall it's going to hang on -- it doesn't matter if it's brick, wood, patterned wallpaper, or just a white wall -- and then after it's up, you can set that picture as the TV's background. The result is something that looks like a floating black rectangle mounted on a wall.