It makes me think back to the Dreamcast. The memory cards (VMUs) slid into the controllers and doubled as a secondary screen. It was monochrome and usually didn't actually provide much in the way of functionality, but the idea was awesome.
I really, really just want a normal controller though. So many games have suffered on the Wii because of the shoe-horned motion controls. I don't mind that the option is there, but it shouldn't be used where it doesn't really make sense either.
If you think about it though, with the exception of Gameboy and GBA, Nintendo control schemes have just been crazy. Some may call it "Innovative," "Groundbreaking" or "Inspired," and some might just call it just plain crazy.
Look at the NES controller. Young people on these forums might not remember that a lot of people thought that this controller was idiotic and stupid. Movement controlled by the left hand? No Joystick? 2 buttons? Crazy! The dominant control scheme at the time was either the 2600 or the 5200 controller, which was a joystick typically controlled by the right hand (though not necessarily) and one or two buttons.
Then the SNES. Shoulder buttons. This was crazy. How would you use these? Wouldn't it make more sense have all buttons on the face, like every single previous generation's controller, as well as the Genesis? SF2, man, everyone complained about having HK and HP mapped to the shoulders.
The N64. The trident. An analog stick, thumb driven? Crazy.
The Gamecube controller. That was just weird.
DS? Dual screen? Why in the world would you use Dual Screens?
Motion controls on the Wii? Wow, that'll never catch on. MS and Sony, they'll never jump on that bandwagon.
And now we have the 3DS. People don't want 3D, they say. It's a gimmick.
And now we have this crazy Wii 2/ Project Cafe controller, which to be honest, I cannot understand. It's crazy. I can't even imagine how in the world this would work in gameplay.
I think that if Nintendo had introduced a conventional Dual-Shock-y controller, everyone on internet would simultaneously lose their sh*t. Conventional is just not the Nintendo way, as much as people complain about what Ninty does with their IP's. People say that they want to skip Nintendo's next console because they can't quite understand what it'll bring to the table in terms of gameplay. I say, if it was something I could easily understand, then I would have been profoundly disappointed with Nintendo.