People are missing the biggest reason its so high.... its going to be running Android to some extent with Androids apps.
Meaning you'll have a REAL OS that can multi-task (both WP and iOS do not truly multitask... they freeze the apps in the background and remember their state).
This should turn out to be awesome. Meaning you'll be able to play a game and watch video utilizing the dual screen setup with TV and tablet. Have Pandora running while whooping up on Ganon's minions so you don't have the hear the next iteration of the annoying 'helper'. You'll have cross game chat, maybe even video chat with a small picture-in-picture type of setup.
This is a really big deal and hints at amazing things from Wii U's OS.







