News of Apple's move towards IGZO (indium gallium zinc oxide) technology in the iPhone 5 display is not new, however reports have surfaced that show Apple could be using IGZO in the next generation iPad. The current iPad uses an IPS (in-plane switching) display, which provides a large viewing angle.
As seen in the diagram above from Semiconductor Portal, one advantage of an IGZO display is improved electron mobility. This means display pixels can be smaller (higher resolution) and more light passes through the IGZO display from the backlight. This reduces the brightness level needed from the backlight and saves power.