The sliding controllers are whatever for me, but I like the look of the dock and screen. Pro controller looks good. All of it is more slick and visually appealing than I would have given Nintendo credit for, considering their usual toy like design.
Really hoping that the thing actually gets a bump from the dock though, enough to output games at 1080p. 720p only would be dreadful.
Mario looks good, instantly more interesting and appealing than 3D World. Looks like we are going back to more open exploration, at least to some degree.