Nikon Projector in a Camera

Nikon have just announced their new range of cameras coming out in the fall, and probably the most interesting one is this - it's integrated a projector into the camera itself, so you can display the photos on a wall or something for people to look at. Not sure how long the battery lasts if you use this, but would save the crowding round the lcd screen post picture taking (providing you were somewhere dark enough to see the projection)