AR Façade is an augmented reality version of the desktop-based interactive drama Façade.
In AR Façade players are able to move freely throughout a physical apartment and use gestures and speech to interact with the autonomous characters who appear graphically imposed in the space using a video-mix head-mounted AR display.
Technical teaser:

The player wears an eMagin Z800 3DVisor headmounted display, mounted on a medical headband. The display has two bright, high-contrast OLED displays and a 40 degree diagonal field of view, and is integrated with an extended-head Point Grey DragonFly camera (pointing forward) and an Intersense IS-1200 Vistracker (pointing upwards).

Some preliminary observations on what people actually do in this scenario:

Players play the role of an old friend invited over for drinks at a make-or-break moment in the collapsing marriage of the reactive characters, Grace and Trip. While some players attempt to pacify the characters, others break the ice with comic relief, performing for friends who can observe the unfolding drama from outside the exhibit. The uneasy social situation becomes all too real as players are able to move freely throughout a physical apartment and use gestures and speech to interact with the autonomous characters...

Link (via Slashdot)
Original Façade online game here.