I expect that one day a company will develop paint that has pixels that can be switched from white to black and visa verse. The matrix or grid of the wall would automatically spread out equally across the space. The really cool thing about this will be the ability to transfer an image from a computer to the wall and have it flip the pixels so that the wall would now reflect the image. The wall would retain the image with no power requirement, other than time of change.
This would start off as black and white (similar to monitors) and then move up to full color.
Imagine changing the color of your children’s room with the push of a button? How fantastic will it be for those same kids to change their room to more accurately reflect their personal preferences as they grow up.