Apple's iPad 3 will be slightly thicker with same screen size
Citing an Asian supplier who is allegedly crafting components for Apple's next iPad, Japanese blog Macotakara claims that Apple's third-generation iPad will be slightly thicker than the iPad 2 for an "unknown reason." That means that third-party cases that cover the back side of the device won’t fit to the iPad 3, but Apple’s Smart Covers will remain compatible with the next-generation Apple’s tablet.
The screen of the iPad 3 will have the same 9.7-inch screen size as the iPad 2, but Apple is rumored to implement the Retina Display technology into the next-generation iPad. One reason for a thicker frame on the iPad 3 could be the components necessary to include a high-resolution Retina Display.
In order to include a Retina Display, Apple may adopt entirely new display technology. One report in November suggested Apple would use IGZO displays from Sharp to reach a 330 dots-per-inch screen resolution. But that report claimed the IGZO display would also allow for a future iPad to be thinner, not thicker. Other reports, however, claimed that Apple would utilize a dual-LED light bar system to illuminate the Retina Display of a third-generation iPad. Apple's apparent difficulties with the higher resolution displays and new LED backlight designs were said to have already affected the launch schedule of the next iPad.
The Retina Display technology was firstly introduced by Apple with the 2010 iPhone 4. Apple boasts that an individual pixel on such screen is so small that cannot be distinguished by the human eye.