In the most recent issue of IEEE Computer Graphics and Applications, there is an interesting article titled "Interactive Tabletop Exhibits in Museums and Galleries."
From the article:
"The museum experience is an unusually tactile, sensual one, and the standard keyboard-mouse-and-screen setup might seem out of place. This trend toward sensual involvement is particularly noticeable in tabletop displays, as they appeal to two aspects of familiar daily life: the horizontal surface as a workspace, and hand gestures (or common objects) as tools for manipulating information."The full article can be viewed online (PDF). Readers should notice that the article contains a nice sampling of various interactive/tabletop exhibits. The Tilty Table, in particular, demonstrates that interactivity and intuitive access can (and should) be combined in the museum experience. A sample video is available (MOV).