We've yet to see any official demos of the PlayStation Eye and the DualShock 4 controller working together. However, the Japanese PlayStation YouTube account has uploaded a video called 'The PlayRoom'. The video shows off a lot of augmented reality and some little demo games. They don't seem to be fully fledged games but rather little party games that you play with friends. It shows off the use of the little touchpad on top of the controller and how it can be used.
The PlayStation Eye will be shipping as additional accessory with the PS4 and won't be coming packaged with the console.