In particular, recent MacBook and MacBook Pro models receive support for the inertial scrolling that debuted on Apple’s current MacBook Pro models, in addition to the new three-finger window dragging gesture that it included on the Magic Trackpad. The MacBook Air, as well as “Early 2008” MacBook Pro models gain only inertial scrolling. The feature, already present in similar forms on Apple’s iPhone OS devices and the Magic Mouse, allows users to “flick” while scrolling as the trackpad senses the momentum of the gesture and smoothly scrolls through long documents and libraries.
A welcome addition to my 2.8Ghz 15-inch Mid 2009 MacBook Pro, but one that probably would never have come without the Magic Trackpad.