MacBook
The MacBook's enclosure will look something like this...
Enclosure: Despite popular belief, Mac Soda believes that the outside enclosure will not be made of aluminum (UPDATE: 9 to 5 Mac has heard the same thing). Similar to the iMac, we believe that the exterior will be made of black, iPhone-like plastic, but the inside will be made of aluminum. Expect the machine to be slightly thicker than a Firewire port (.5+ inches).
Screen: 14 inch, 16:9, LED display, with an iSight camera with improved quality at the top.
Keyboard: Chicklet keyboard, similar to the one it currently has, but backlit (more like the MacBook Airs).
Trackpad: One word: glass.
Processor: The processor will be from the Centrino 2 family. Expect 2.1-2.4 GHZ speeds, but improved battery life to go with it.
RAM: Up to 4 GB.
Graphics Card: As reported first by Mac Soda, the MacBook will replace Intels integrated graphics card with nVIDIAs. Read more about it here.
Optical Drive: Expect an updated Superdrive, with support for Blu-Ray.
Bonus Goodies: Possibly a smaller power adapter and HDMI support. Displayport!
Price: As we predicted earlier, expect the MacBook to drop fairly significantly in price. We are expecting a 300-400 dollar price cut, pricing the MacBook at 699-799 for the base model.
MacBook Pro
Enclosure: All aluminum, all the way around, like it is today. It will be about the same thickness as the MacBook (.5 inches+).
Screen: 16 inch, 16:9, LED, iSight for the base, and 18 inch, 16:9, LED, iSight for the top model.
Keyboard: Chicklet keyboard, backlit.
Trackpad: Glass.
Processor: Centrino 2 family, up to 3 GHZ, Quad Core offered, improved battery life for all models but Quad Core.
RAM: We anticipate that the MBPs will allow for up to 8 GB of RAM.
Graphics Card: In order to please video professionals like myself, Apple will definitely offer a better graphics card than they do now. We have not heard exactly which cards they will offer.
Optical Drive: SuperDrive updated to Blu-Ray!
Bonus Goodies: The obnoxious latch the MacBook Pro has now will be replaced, as will the denting power button. HDMI-out might be offered, Displayport will definately be included, and the sound quality will be improved greatly, as Steve has been obsessing over sound lately. Potentially a new Firewire standard.
Price: While I wouldnt be surprised if the price stayed the same, I believe that the MacBook Pro will boast a 1799 starting price.
MacBook Air:
Enclosure: Same as it is now. If it changes, I would be very surprised.
Screen: Same.
Keyboard: Same.
Trackpad: Glass.
Processor: A better, more efficient, 45 nm, faster, processor will be added to the air.
RAM: 4 GB.
Graphics Card: Not much improvement, if any.
Hard Drive: Bigger, and cheaper.
Optical Drive: Nowhere to be seen!
Bonus Goodies: Cant really think of any
Price: 1499 (or cheaper).