My take on it was that that was a pre-production test chip. The makeshift cover on the chip would seem to indicate that. The final version would be the one to be concerned about. I also refer to all the rumors (especially that diagnostic dump that showed 4 cores) that point to a quad core chip being the final product. It most likely will be a Cortex A9 and not the A15. I would expect the Cortex A9 still will benefit from the 28nm fab process which will allow lower power and faster speed.
The GPU is the part that will be updated the most to handle the Retina display.
I was mainly disappointed by the fact that it features 16GB of storage, a sign they haven't upgraded the standard size for the iPad3 to 32GB.
You can't just dismiss a quad-core chip as "tablets don't need it." In an OS optimized for multiple cores, the more the better, IF other parts don't take a hit like battery life. I trust Apple that whatever CPU / GPU they put in the iPad 3, it will be plenty fast and efficient - they have a damn good record so far, save for iPad 1 and the lack of memory there.
That dump didn't show 4 CPU cores at all. It showed 4 NAND flash devices - that's simply the flash storage. No mention of the CPU at all other than that part number.
I think it might have been real though, because what it did show was 1GB of memory - the iPad 2/iphone 4S have 512MB.
A9 sounds more likely to me too - A15 and possibly quad core next year.