Here's my prediction, and with this and $1.99 you can buy a cup of coffee, so start heading for Starbuck's now!
The new MacBook Pro, when it comes out, will functionally be much the same as the current one. Faster processor, maybe; better video card, maybe; LED backlight, for sure.... It will continue to be in an aluminum case, which may very well be almost the same thickness in the middle, but will be much more curved in shape, like the MacBook Air. Don't mistake this for styling, pure and simple. It will, by virtue of its shape, be much more rigid and yet lighter. When VW brought out the Cabrio, they had to add a big X-brace to the platform because it didn't have enormous contribution to rigidity of the original Bug's egg-shape. This is the same evolution in reverse. I further predict that you will hear the same complaints about "style over substance." All of Apple's competitors seem to think the two are mutually incompatible.