The PixelQi screen is one of the most exciting developments in display technology since LED-backlit panels. To be clear, it is not simply an e-ink screen with backlights. Instead, the new panels are based on the same conventional liquid crystal display used by current laptops and monitors.
The main difference is that PixelQi models have an outdoor-readable mode that turns the backlight off. This not only reduces power consumption, the fast LCD refresh rate also allows for video playback, unlike e-ink devices.