Ars Technica: The iPad (4) is basi­cally the same as the iPad (3) on the out­side, except for the Lightning con­nec­tor. But on the inside Apple changed out the brain for a bet­ter one. The iPad (4) is pow­ered by a new A6X CPU. Samsung man­u­fac­tures the 30% larger A6X using a 32nm process. Four GPU cores much larger than the cores in the A6 (SGX543MP4) take up almost all of the increased space. And those mon­ster GPU cores make a big dif­fer­ence. Anand Lai Shimpi, AnandTech:

Ultimately it looks like the A6X is the SoC that the iPad needed to really deliver good gam­ing per­for­mance at its native res­o­lu­tion. I would not be sur­prised to see more game devel­op­ers default to 2048 x 1536 on the new iPad rather than pick­ing a lower res­o­lu­tion and enabling anti-aliasing. The bar has been set for this gen­er­a­tion and we’ve seen what ARM’s lat­est GPU can do [...]

When it comes to graph­ics inten­sive apps tak­ing advan­tage of all 2048×1536 pix­els the iPad (4) is roughly twice as fast as the iPad (3). That’s good, but if you have accu­mu­lated a lot of periph­er­als for your iPad ask your­self this ques­tion: Is twice the graph­ics per­for­mance worth the has­sle and cost of hav­ing to replace all my 30-pin periph­er­als with Lightning ones? Me? I only have a sel­dom used Apple Bluetooth key­board, but nah, I’m quite happy with my iPad (3). And it’s too soon.

PS: Forgot one thing. The front cam­era (640×480) has been upgraded to FaceTime HD (720p).