The display had be going too, but seems the iPad 3 has a reason for having a big gpu. Video output at 1080p is great on the A510 I have, but seems the gpu might choke some pushing data along with video, at there res. Seems game emulators could fair for the worse as well.
Again, why does the iPad 3 have a big gpu unless needed to push the pixels? Apple is not going to blow hundreds of millions for nothing.