I wonder if the look is going to be similar to the iMac in regards of the choice of materials. Morevoer I also wonder if they are going to keep the backlit Apple Logo on the back of the computer (one of the best marketing inventions in computer history if you ask me).
If the MacBook (not PRO) is going to somewhat borrow the iMac looks, which it should (just like the white plastic theme previously) I wonder how the PRO line is going to be shaped. Apple has to combine, in my opinion, the minimalistic and classy look with one that stands out in the crowd, as many users are grown used to it/love it.
A black Mac, plain and simple as seen in some photoshopped images, would not stand out or be innovative enough for Apple. It would get too "normal" and even "boring".
I love my MacBook white, and like the design of the iMac (alluminium) my girlfriend has. On the notebook however, one is much more "tied" with regards of design. So the choice of materials, the small little details, are the ones that make a difference.
That said, I am also looking forward to see what the PRO line design is going to look like. Creating an "alluminium iMac" like design for the MacBook PRO line would not make sense at all.
All in all I am really looking forward to my second MacWorld as a Mac owner. It is an exciting moment (not for my bank, if you ask them).
Personally I still hope that the AppleTV gets a hefty software revision and content is available in more and more countries.
This time around, I'll make sure I don't buy into any "hobbies" from Cupertino, but only in real products (btw. AppleTV does a lot of stuff I like, in a way I like, I just concentrated on the biggest shortcoming).