The first Leopard iChat demo video from Macworld Expo in January Apple shows a feature called “display sharing:” Narrator: Screen Sharing lets you remotely observe and control your buddy's display from the other room or another time zone. Initiate a screen sharing session and iChat immediately kicks off an audio chat so that you can talk through simultaneous control of a single Mac desktop. Create Web sites together, make travel plans or review that big presentation. iChat with display sharing opens a whole new world of collaboration possibilities. Curiously display sharing is not mentioned in the Leopard demo video (Apple, YouTube) of iChat from WWDC 2007. The new demo mentions "iChat Theater" but not a peep about "iChat display sharing."...