When Apple updates a product, there's normally more than one big advancement in there. This is certainly true of the new MacBook Pro ($2000-$2800). The 15" models have been bumped up to 2.2 and 2.4 GHz Intel Core 2 Duo processors, sport beefier Nvidia GeForce 8600M GT graphic cards, and can now handle 4GB of RAM. The big deal, however, is the new 15" LED-backlit LCDs that are more power-efficient and mercury-free. Speaking of displays, the new 17" model can be equipped with a 1920-by-1200 display, which has garnered it the nickname "MacBook Pro HD."