General web usability guidelines recommend sans-serif fonts with high contrast color selection (high-contrast white on black or dark blue rather than low-contrast like Chadwick's blue-on-blue).

They will basically be the same sensor and focal length, but one will be tasked to carry full color info, the other will capture only black and white but will be better at low light situations.

Meanwhile, Pixel Qi, a California-based startup, is showing LCD displays that can do double duty as color screens as well as low-power, black-and-white displays.