Thinking about this a bit more, I'm not sure the A6 will be quad core. If apple go with a retina screen, they really need to increase the graphics power.
Now considering that they'll move to a new 'chip process', they'll have more space on the A6, meaning they can fit more on without affecting costs or battery life. A quad core CPU would probably take most of that extra room, and not leave enough for a big GPU boost.
Plus, a quad core CPU might not be all that much better. Most apps aren't going to use 4 cores. Most still just use 1 in fact - which leaves 1 spare for getting email etc. in the background on the A5. So moving to quad core wouldn't be all that much better than dual core. Instead, they could beef up the dual cores, perhaps run them a bit faster - that would give a decent speed up in ALL apps, not just a select few. And they'd have space for the big GPU needed for that retina screen.
Double plus: They could go with Arm's new "big + small" architecture. Improved dual core for regular use, plus a wimpy single-core CPU that uses a lot less power. The little core does things like checking email when the iPad is in standby, where you just don't need a big powerful CPU. This can increase battery life quite a lot!
If they went with that, I think we could see better battery life, games that run well on a retina screen, and better performance (even better than a quad core in most apps!)
Now considering that they'll move to a new 'chip process', they'll have more space on the A6, meaning they can fit more on without affecting costs or battery life. A quad core CPU would probably take most of that extra room, and not leave enough for a big GPU boost.
Plus, a quad core CPU might not be all that much better. Most apps aren't going to use 4 cores. Most still just use 1 in fact - which leaves 1 spare for getting email etc. in the background on the A5. So moving to quad core wouldn't be all that much better than dual core. Instead, they could beef up the dual cores, perhaps run them a bit faster - that would give a decent speed up in ALL apps, not just a select few. And they'd have space for the big GPU needed for that retina screen.
Double plus: They could go with Arm's new "big + small" architecture. Improved dual core for regular use, plus a wimpy single-core CPU that uses a lot less power. The little core does things like checking email when the iPad is in standby, where you just don't need a big powerful CPU. This can increase battery life quite a lot!
If they went with that, I think we could see better battery life, games that run well on a retina screen, and better performance (even better than a quad core in most apps!)