Retina Display have first seen light as a new Apple technology when iPhone 4 was released last 2010. It is a high-resolution technology of Apple, which makes it possible for users not to see individual pixels. Apple is said to be able to come up with this technology by giving a higher density of pixels, a higher contrast ratio, In-Plane Switching (IPS) and LED backlighting.
One of the many items included in the rumor list of the iPad 3 was its alleged Retina Display. The current iPad resolution is 1024×768 and the rumor is that this will be doubled to 2048×1536 at a 260 DPI. This rumor is not really confirmed, not until the recent release of the iBook app 1.1. The iBook app contained four boomark icons and one of them read iPadx2. The “x2” is used by Apple with iPhone 4 and iPhone 4S specifically referring to the new iPhone doubled resolution from its predecessors.
With this icon seen on the iBook app implies that the new app would require a higher resolution when used with iPad 3. Seeing “x2”, also fueled rumors the Apple may indeed double the current resolution of the iPad with the upcoming iPad 3.
Apple removed the icon in subsequent iBook versions but that did not stop the rumors of the iPad 3’s new Retina Display. Another discovery which supports this rumor is the fact the Apple is said to be upgrading the GPU of the iPad 3 since this kind of power is needed for a higher resolution device.