Wii U games Resolution and fps talk. We need to clarify something.

[DarkTemplar]

Unfortunately we cannot just sum the screen resolution and the Wii Pad resolution because is it actually more demanding to rasterize two different viewports (in this case 480p + 720p) than a single viewport with the same amount of pixels.

There are a few reasons for that. For instance, while rasterizing two different viewports the CPU and GPU caches will suffer from more misses because of the Principle of Locality.