A pair of new reports suggest the second-generation iPad will feature a 2048x1536 display, as well as a multi-core GPU and multi-core ARM Cortex-A9 processor. Mac Rumors reports that two iPad “x2” graphics have been discovered in the latest version of iBooks, including a bookmark icon found in August, and a new wood tile graphic, both of which are twice the resolution of their predecessors, suggesting an overall resolution of 2048x1536.…