But it is all about the games. If they can make a Jedi fighting game, where the you can duel with these things and your movements are caught perfectly... then I will be playing with this all day and all night for the rest of the year. 
The thing about this (as far as I know) is it will never really work out that way because there's no resistance. You swing and your enemy blocks - all of a sudden there's no synchronization because you carried out the motion to completion, but your character didn't.
As for motion controls, I don't think either will be as mainstream as on the Wii, but they don't have to be - they just need a few good games, and if they're catering to a different audience, that'll make it a bit easier for them. I'm not into them either really, but I do see the appeal sometimes.
To be honest, I think Nintendo might have fucked themselves up a bit with the Wii. They've pushed so hared to cater to the mainstream audience and pushed away quite a large portion of the audience that buys and plays a ton of games (I'm reluctant to use the word "hardcore" or "gamer" here). When this console cycle ends, I think they'll have a hard time convincing the mass market purchasers that they need to upgrade. They'll also probably have a hard time convincing the "hardcore gamer" segment that the console will be worthwhile at full price when there may not be all that many appealing games on it.
