This technology looks like it has incredible promise. In a nutshell, it will erase all moving objects (like annoying tourists) from the frame when you take a picture.
Obviously, key to this is that the object of your affections stands stock still (like a monument tends to) and you have some form of optical stabilization on your camera (a tripod would do just fine but, my guess is, that stabilization can be built into the Monument Mode algorithm).
Promising. Watch the video below.