Sony has filed a patent to protect its ideas about emotion detection using the PlayStation Eye.
The resulting device, according Siliconera, will know when you're laughing, bored, sad, angry, full of joy or interested. It even spots high-fives.
The PlayStation Eye does this by using a mixture of audio and visual feedback. If you are "looking away from the presentation, yawning, or talking over [it]" then you are considered bored, for example.
Sony mentions applying this technology to TV, film and other media presentations, too.