i does not sees a point
Reason for edit : fixed a typo

 

Still I don't think this reveals anything about the final design of the Wii U.
There are rumors about a different controller design out there and I don't think Nintendo are willing to leak something before their E3 presentation.

What could be a possible use for this is the ability for you to use the Wii U screen with your Wiimote, the Wii U controller supposedly has LEDs built in, much like the Wii sensor bar.

 

It looks a bit like an iPad dock. I like it. I would just love to play some GameCube like this.

 

Probably would have been part of the patent. That's also why I'm not convinced that walker thing is real, by now we'd likely have seen at least some sort of patent for it, even if it's just a partial or incomplete one.

 

Either a stand or a charger, me thinks.

 

i detest docks. rather have a simple cable.

 

I heard somewhere that the latest revision features analog sticks rather than circle pads. No idea how credible of a claim that is, though.

 

*Sigh*... come on Nintendo, really? How on EARTH they get the idea that circle pads can be anywhere near as effective as analog sticks?? It's not like the Tablet controllers is meant to be put in your pocket, so what's the point? It can't possibly be for mobility

 

No, the Rayman Legends trailer was intended for an in house showing, it was by no means an E3 leak and there are several factors to prove this like the BttF music, the unfinished animations with frames coming directly from origins, undecided Wii U features etc.

The Wii U controller used in that video is the same as the E3 2011 one, it's connected to the TV, it has black tape on the back, the stylus is missing from it's slot etc.
While wireless transmission using ni-fi has been worked out with 60fps streaming I doubt that it's the one used in that showing.
Rumors have been saying analog sticks for a while now.
A controller will always have changes between first reveal and final product, even if they are minor. And the controller Ubisoft is using is identical to the one showed last E3, thus meaning that the "trailer" didn't leak any new technical information at all.

No one knows how the final controller will end up looking like except for Nintendo, devs are still using the old E3 controller for game input despite the numerous devkit updates the console has been receiving.

 

Judging from video footage they have a much larger traveling radius compared to the 3DS one.
They are elevated which seems to help too.