I don't understand why everybody would be so shocked by an increase from 10 to 14 hours of battery life on the 13'' Macbook Pro. Apple just recently filed a patent for a new battery technology, and if they decided to remove the ODD to make it thinner (which the possible Intel ad shows) then it would be a relatively simple task to achieve that kind of battery life. There are 3 ways that Apple could increase battery life significantly on the new MBP's.
1. Decrease the size of the logic board by using the integrated Sandy Bridge GPU, which is almost as powerful as the 320m but uses WAY less power. That would allow for a larger battery and would increase battery life in general.
2. Improved battery technology which Apple has already filed a patent for and are known for doing.
3. Removing the ODD would massively increase the amount of space available for battery cells.
It wouldn't surprise me if number 3 happened, with the introduction of Light Peak and Apple's constant focus on digital distribution (they are apparently removing optical media from Apple stores) it wouldn't be a huge shock.
Number 2 would likely offer gains, but not the 4 hour gains being discussed, although it would certainly contribute. Number 1 is also a possibility, though not so much in the higher end 15'' and 17'' models as their users tend to need and prefer a discrete graphics chip.
