I'd take this new idea any day over the Playstation's 3 year old design.

What's the problem with having fewer buttons? The motion sensor covers much movement involved in games. Ex:
Zelda: Movement with analog stick, shield with B button(possibly aim the shield at different locations throw motion sensor), hack away by swinging your controller, D-Pad can be used for your on-hand inventory, A can bring up the menu.

Resident Evil: A can start the aiming process, moving can aim, B shoots.

Honestly, I'm starting to believe people are picking at Nintendo simply because they actually do new and unique things.