I just joined here to contribute something. A lot of you are saying there is not a CPU/GPU on the planet that could run off a battery, fit in an ipad, and handle a 'retina display'.
But i have seen quite a few video's where the BlackBerry playbook is outputting stereoscopic 3D at 1080p and 60fps and fireing it's own display as well.
Maybe i am missing something, and there is some clever resource friendly scaling technology going on. But if i'm not missing something, then the rettina display is only 1/3rd more pixels, not 3D, and could be at 30fps instead.
If anyone finds flaw in my logic please point it out because i would like to know where i am wrong too
And i am in no way saying iPad 2 will have retina display, but i do believe it is atleast technically possible.
edit:
Would just like to point out, fireing two 1680x1050 monitors:
-130mb of VRAM with all other apps closed.
-170mb VRAM usage with FireFox 4 open.
If i change to one monitor at 1024x768:
-60mb of VRAM with all other apps closd
-100mb of VRAM with FireFox 4 open.
1024x768 = 79872 pixels.
(1680x1050) x2 = 3528000
3528000 divided by 79872 = 44.
Increasing the pixel count by a magnitude of 44 only increase VRAM usage by 70mb.
So if this is anything to go by, increaseing ipads memory from 256mb to 326mb (yes i know you can't do that) would be enough to support the retina display. Unless you opened a game, where i don't know what would happen.
Just a quick overview to give some people an idea.