Just because they remove buttons doesn't mean they remove the functionality of those buttons from the controller.
Nintendo has some new control scheme where they can at least give the functionality of the 360, PS3, and GC controllers in a simplier, more intuitive control scheme.
In other words, the goal is to make the controller as easy to use as the NES or SNES controller for a novice, have it be less cluttered,yet retain the functions of all those dang buttons and sticks on the current GC controller. You also need to make it so you can hit all those functions at once or independently.
The revolutionary design Nintendo has cooked up does all that and provides new types of games to play for home consoles.
The Gamecube, X-Box, and PS2 are still using the same basic controls that arcade games have used for the past 30 years. Surely there has to be a better way.
If you had gyros and pressure sensitive handles, you possibly could get rid of the digital pad, camera stick, L, R, and Z buttons, for example. That would go a long way towards making things easier to use.