Microsoft Windows Vista SideShow - In-Depth (pics)
Windows Vista SideShow is a secondary display that's going to be built into notebooks and Tablet PCs in the second half of this year. The display can be used to view email, calendar, and other Outlook data, in addition to light gaming and other gadgets. SideShow displays are self powered, so they work even when the host device is turned off. This is just the first step though. The platform allows for SideShow to be built into other devices as well, like keyboards, phones, display casings and remote controls.
Source: Tablet PC Reviewspot