Here's an article about the new "Slide Show" product:
http://biz.yahoo.com/bw/060104/20060104006103.html?.v=1
"The PortalPlayer Preface technology platform enables a second user interface in new notebook computers that seamlessly integrates with a flexible new feature set in Microsoft Windows Vista called Windows SideShow. The combination of these technologies enables notebook computer manufacturers, working with application developers, to introduce a second user interface for notebooks and a set of applications that link to the programs and data stored on the main system. The new interface is "always on," providing immediate access to critical content such as e-mail, contacts and other digital media. The main components of the complete secondary subsystem include an ultra-low-power processor, a second display and user controls that can be installed in various locations, including the notebook cover on the other side of the main display."