Okay, here's my thoughts on this:
Some of these details are so off-the-wall and impractical that I'd easily assume they were just another part of the regular flow of misinformation constantly being spread across the Internet-- except there seem to be way too many consistencies from too many independent sources for it not to have some legitimacy. Having a controller that has motion controls, dual analog sticks, and a 6-inch touch screen can't possibly be part of the same hardware. I'm thinking it's one of two possibilities: Either Nintendo has purposely concocted multiple false leaks to throw the press off, or at
some of these features are in fact for a separate peripheral, and not part if the standard controller. My guess is that the touch-screen is something separate, and the rest will all be part of what will essentially be the standard controller. After, piecing all the reports together (excluding the touch screen), and using some common sense, I've concocted my own concept design:
http://img.photobucket.com/albums/v292/bman87301/cafe-1.jpgBasically, it's an update of the Wii remote design, but more ergonomically shaped, and with an added 3DS-style analog circle slider as well as additional face buttons and a shoulder button (when it's on its side), which more or less removes the need for a separate Classic Controller. The B trigger is now analog-pressure sensitive. The Nunchuk is essentially the same only now with a phone-styled coiling cord, and an analog Z button (to go along with the analog B on the remote).
P.S. In case you can't tell, the button on the very top, above the D-pad and Circle slider on the remote is the POWER button.