Researchers at Oxford University in England have created nanopixels that measure just 300-by-300 nanometers. Compare this to a modern smartphone with a 400 ppi display, where each pixel is about 150 times larger (about 50 microns across). Furthermore, Oxford's prototype nanopixel displays are both low-power and thin and flexible. Ultimately, these nanopixels could eventually be used in extremely high-resolution displays with billions of pixels -- though it might be rather hard to find a graphics card that can drive a 198000x120000 display, of course.