As the display-resolution arms race heats up, computer and mobile device makers need to look beyond silicon to get sharper images. By replacing the backplane of LCD displays' silicon with the semiconductor indium gallium zinc oxide (IGZO), manufacturers can shrink pixel size, making screens sharper. That semiconductor swap also results in energy savings because electrons zip around more quickly than they do in the current amorphous silicon. Sharp's prototype crystalline IGZO display has a 6.1-inch screen and a resolution of 498 pixels per inch, far outstripping the iPhone 5's 326-ppi Retina display. (And yes, despite Apple's claims, you'll be able to see the difference.) IGZO can also be incorporated into organic LED displays, boosting resolution and efficiency. Sharp is already manufacturing first-generation IGZO displays.