Who cares about night vision. Unless I missed a whole lot of development in physics, the ability to passively shift frequencies from outside to inside of visible range is the cool thing. I'd like to wear this material during the day, possibly with a visible light attenuator in front. The world may look different in beautiful or practically important ways when viewed at wavelengths outside our visual range, and we won't know how much until we start actually seeing them as we move about.