7. Wii U might have tethered controllers
The tablet has a rather incongruous cable sticking out the top, leading some to think that Wii U has dropped its wireless functionality. If this is true, the controller has undergone cosmetic changes - at E3 last year, the charging socket was clearly on the tablet's base. It would certainly gel with rumours that Nintendo can't get wireless play working with acceptable consistency. BUT...
8. Wii U probably won't have tethered controllers
Ubisoft quickly pointed out that this is a work in progress dev-kit used in a trailer intended for internal use only. Dev-kits aren't indicators of finished products - the 3DS kit has GameCube pad support - and shouldn't be seen as such. Wireless play is at the heart of the tablet's design: Ninty aren't going to tether a pad designed for 360-degree motion yanking to a console.
9. Wii U's NFC capabilities could be a lot of fun
NFC, or Near Field Communications, is a means of data transfer between an NFC 'tag' and a 'reader'. It's the tech behind Skylanders' toys, and is now confirmed for Wii U. Placing chip-embedded figures on the tablet transfers their data to the game. A heart might give a health boost, for example, while a Rabbid toy unlocks a mad bunny-infested bonus warren to explore.
10. Wii U's NFC capabilities could be very expensive
Question is, is NFC just a fancier (and more expensive) take on DLC? Buying extra doodads appeals to the ten-year-old Pog collector in us, but isn't this the very micro-transaction model of play Nintendo are so adverse to? Won't our houses become cluttered with plastic trinkets? God help us if the Pokémon Company decide they want in. Hopefully, E3 will explain all.