I almost forgot what I was super excited about hearing tomorrow!
I think it is going to be very interesting how Apple "upgrades" the Retina display. Remember, back with the introduction of the iPhone 4, Steve Jobs said that a retina display was capped at 300 ppi. Your eyes could not sense any pixels at that point already. So why is there all of a sudden a need to make it higher resolution?! To waste battery? Batteries are bad enough!
This moment will be huge.