With the idea of StreetPass, the WiiMotes where you can carry your Mii to another console, and some of the things the article BnM quoted, I'm thinking the controller could be a weak tablet. Hell, there could even be levels to it. One controller would have to be a shell that held a 3DS, the basic controller has limited memory, a single core Atom CPU (or otherwise outdated, cheap, but still good enough to do the basic functions of this controller CPU), a low-res LCD screen, and whatever button configuration. I also think the basic controller could be a shell with a screen that the WiiMote and Nunchuck not only strap into, but are powered by the rechargeable (but interchangeable) battery in the shell-with-a-screen. Controllers could then go up in specs, design, etc. while still being able to provide the basic functions of the controller, maybe still having the ability the have a Wiimote and Nunchuck (or Cafemote and/or whateverthehellelse).