Hi folks, I don't follow this as closely, nor do I understand, as many of you. I think everyone has noticed that there is way more redundancy that we're used to seeing from Apple in their new offerings. None of us can really speculate accurately on when the 13" retina will come, but I think most agree that eventually it will. Ideally I would like a 13" retina with discrete graphics. Any processor Apple puts in at this point will likely be more than enough, and 8GB of RAM is becoming the standard. Is there a reason that previous versions of the 13" don't have discrete graphics? Heat? Battery? Would these still be (or even more so) limitations in the new design preventing this from ever happening? In the live thread yesterday the poster noted that a huge amount of space was taken by the battery in the 15"; would that be the main limitation for the 13" on top of the heat dissipation that others have noted?