Solid-state trackpad...

[miniConvert]

http://store.apple.com/uk/browse/home/shop_mac/family/macbook_air?mco=MTM3Njg5MDE in 'Tech Specs':

Solid-state trackpad with Multi-Touch gesture support for precise cursor control; supports two-finger scrolling, pinch, rotate, swipe, three-finger swipe, four-finger swipe, tap, double-tap, and drag capabilities

This is a typo, right? Made me smirk.

 

[mickbab]

Perhaps it means solid-state as opposed to the clickable trackpads of the other MacBooks? Or a typo

 

[MultiFinder17]

No typo, they've been calling their trackpads that since 1994 with the PowerBook 500 series

From the PowerBook 540c Specifications page: "Solid-state trackpad provides precise cursor control in response to the user's fingertip over its surface"