The reason is that if this analysis is internally consistent then we ought to be able to add layer-by-layer on to it until we get to the complete analysis.
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.
From the introduction of user-friendly labels like "My Computer, " through the abortive "Microsoft Bob" project (an attempt to build an extra, easy-to-understand layer on top of Windows -- an interface for an interface, if you will), the software giant has been waging a war to get the geekiness out of its operating system.