Be careful calling things light gun games. I don't want you to be disappointed. You won't play the plunger game by holding the remote up like a gun, more like a 3D pointer like Metroid. It is a ton of fun though. Rayman is going to be one of the best mini-game games out.
Trauma Center was incredibly hard at the press event in september. I hope that sitting on the couch and being able to brace my arm a bit will make it playable.
You can also see a shot of the Wario Ware driving boss game in the video. It was surprisingly fun and had a very interesting not so responsive feel to it. I have no doubt in my mind that this will be the best WarioWare game yet.
They also show in this video how they made the move from using the stick to pull the grapple beam to actually pulling the nunchuck back in Metroid. That was a welcome change too.

The video also does a really good job of showing the kind of motions needed for the sword combat in Zelda. If anything, what he is doing is a little towards the extreme of what you actually have to do, and, as you can see, he isn't flailing his arms around.
Nintendo is doing a good job of pushing these promo videos closer to how you actually play the games.