Yes, who would’ve guessed that a couple of .png files could in fact prove that an iPad 2 is in the works? Well, MacRumors has reported that in the iBooks 1.2 source files there is a file called Wood Tile@2x.png. This file is the background of your bookshelf in iBooks. The resolution of the new file is 2048×1536 or 2X the resolution of the current iPad.
Also found was the bookmark picture/icon, also made X2.
Why would they include these when there is currently no device that can handle them? And why can’t Apple keep secrets as well as they used to?