As we learned when the console was initially announced, the Wii U's "proprietary high-density optical discs" hold up to 25GB of data -- equivalent with that of Sony's single-layer Blu-ray format on the PlayStation 3, and much larger than the Xbox 360's dual-layer DVD format.
Kindle Fire HD solves this air gap problem by laminating the touch sensor and the LCD together into a singlelayer of glass, creating a display that's easy to view even in overhead light, and reducing glare by 25% relative to iPad 3.
