The original iteration of Move was an ingenious design: PlayStationEye locked onto the glowing sphere via calibration and then judged depth owing to the size of the sphere in its 2D field of view.
The PlayStation 4's new Eye motion camera has a tilt sensor so it can tell players when its facing the wrong direction or if it's fallen off your TV stand.
Nothing earth-shattering, but, for example, we now know the Blu-ray drive on the unit is three times faster than that in the PS3, the cap of 100 friends on the PlayStation Network is being lifted, the new Eye camera has an integrated tilt sensor and the Remote Play functionality will let you play PS4 games at the Vita's native resolution of 960 x 544.