I don't think Apple will want to complicate things with different CPU versions of iPad 3. What are they going to do then, show demos of both versions at the press event? They will pick 1 CPU, and advertise how great and fast it is.
I don't think Apple will start the iPad 3 at $579, that would imply that iPad 2 pricing stays as is. I think it's much more likely that the iPad 2 price gets cut to $399 or $449, and the iPad 3 starts at $499.
A $399 iPad 2 (if margins permit) would be perfect for competing on price against lower priced Android tablets, same as the iPhone 3GS and iPhone 4 now. But the newest model will still end up being the best-selling.
I don't think Apple will start the iPad 3 at $579, that would imply that iPad 2 pricing stays as is. I think it's much more likely that the iPad 2 price gets cut to $399 or $449, and the iPad 3 starts at $499.
A $399 iPad 2 (if margins permit) would be perfect for competing on price against lower priced Android tablets, same as the iPhone 3GS and iPhone 4 now. But the newest model will still end up being the best-selling.