The Wii Remote's motion control is quite sensitive. Though many games are shown with people doing the broad, full motions (like a tennis racquet swing or a sword slash), oftentimes a very subtle motion will do. Despite not usually "fully" slashing in Zelda (by the late afternoon I was just jiggling the remote), I found today that the right side of my body, from my neck to my right buttock, is sore and tense. I could have overdone it. (Hopefully it's just a case of me not being used to it, I don't think Nintendo would honestly produce a potentially injurious product.)
They really should warn you about playing with your Wii all day long.
The Power Glove has some nerdy appeal, I had one but returned it because it wasn't a good controller but it is a fun thing to just have. Control-wise, though, the Wii Remote is nothing like the Power Glove and vice versa. In the old Power Glove ads a guy is seen punching with the Power Glove in Punch-Out!!, but you don't actually do that. But in Wii Sports: Boxing you actually would be doing a punching motion with the Wii Remote.
And how fun is it? Certainly worth my dollars. Of course, at the moment I only have Wii Sports and The Legend Of Zelda: Twilight Princess. Wii Sports is interesting; I like Tennis the most. Boxing follows. Baseball and Bowling I suck at and my skill and enjoyment of Golf is abysmal. I have yet to try multiplayer (my brother was doing homework all day yesterday) which will probably make Tennis, Boxing, and maybe Baseball more fun. Since I don't play sports in real life, I imagine this would be more fun to someone who actually occasionally touches real sports equipment. But I will keep playing because of the Fitness Age, similar to Brain Age for the DS where a graph records your supposed "Age" and progress in reducing it to 20. Unfortunately my Fitness Age yesterday was 80... >_>
Zelda is also on the GameCube, which would also be a fun game but I am much enjoying the Wii version with its 16:9 widescreen, improved graphics (though probably not by a ton) and Wii controls especially. Every 3D Zelda title has had something new and unique to it...without Wii controls, Twilight Princess would be too much like Ocarina Of Time. Well, I suppose there are some additional gameplay elements like the whole being a wolf thing, which you can't ignore, but when Link is human the gameplay is little changed from anything you've seen in Ocarina Of Time. Not a bad thing, but I'd certainly recommend the Wii version. The Wii Remote is handy for the manual targetting with certain weapons like the slingshot and boomerang. I have a fishing rod, but not a good one with a reel yet so I can't comment on the fishing yet. If I had to be honest, though, Twilight Princess's story (so far), presentation, and length are actually what makes this game so great. At least the Wii controls are integral enough that it's unfair for anyone to think that they were simply tacked on at the last minute.