The latest version of the Kinect features 3D depth sensors, "Active IR," and facial recognition. Microsoft also says it can detect levels of force applied to an action and detect a human heart rate. All this seems like it would be handy for differentiating humans and animals.
Here a demo of the latest Kinect features:
Does anyone see this as being something promising for security applications? There are a few hacks online here and here, but I haven't found any other serious applications like Singapore or South Korea. It seems like it could be valuable if someone figured out how to integrate it with security systems.