When it comes to motion control controllers, it's pretty obvious that Nintendo was thinking the right thing with their wand design. The Sixaxis just can't be used in the same fashion, simply because of it's physical shape. You can't grip a Sixaxis and swing it like a baseball bat or a tennis racket. It's just not a natural thing to do. That has severly limited what the Sixaxis could do. By shaping the Sixaxis as a contemporary controller, they basically ruined most of it's functionality as a motion controller. Sure, there are some other cool things that you can still do with it. But holding it like a tennis racket or a baseball bat, or holding it at the screen like a gun, just doesn't make alot of sense. With the Wii, it's perfectly natural and makes alot of sense.
There are a ton of rumors floating around that Microsoft is going to come out with their own motion controller for the 360, and I pray to God that they somehow ape the Nintendo Wii Wand design. The big question I have is how much can they really copy from it, without worrying about being sued? Nintendo themselves are already being sued by some company that has a patent on a device that looks very similar to the Wii-mote.
All I know is, that I'm very excited about the possibility of playing games like Wii Sports with some real High Def next-gen graphics, but if the thing is shaped like a conventional controller, then I really have no interest. Shape it similar to the Wii-mote, maybe make it a bit larger and longer, a bit more ergonomic, and I'll be very pleased. Then immediately assign Visual Concepts to make MLB2K8 around this new peripheral, and it's all gravy baby. Just imagine playing a true Next-Gen game, with all the Next-Gen graphical trappings, but also having the inovation of the Nintendo Wii-mote. I think that would be pretty damn pimp.