We all know and love the multi-touch interface on iPhone but what about using it on other devices? Multi-touch was rumored to be included in the new iMacs, but that didn't materialize. It has also been suggested that multi-touch could show up in an upcoming refresh of Apple's monitors.
A recent extension to a patent Apple filed in 2004 (thanks Gizmodo) shows that they may extend the technology to their notebook lineup.
If you're paranoid about marring your beautiful glossy screen, fear not fair citizen. This version of multi-touch will allow you to use multiple finger gestures on an extra-wide trackpad, instead of touching the screen.