It allows lenses to perform well in a sub-zero conditions, by resisting frost and fog. The coating is not only applicable to camera lenses, but also on surfaces as large as car windshields. Typical anti-fogging solution for camera lenses involves water absorption; which can reduce distortion and light scattering.
However, frosting may still occur during extreme conditions. The new coating simply repels water to prevent the formation of larger water droplets on and around the camera lens.