douchebags on g4 think saggle is the best out of all three

Well, it is. Natal is promising, but Wii just looks like shit all around. Good system with motion tracking > shit system with motion tracking.
The Wii is $250. PS3 is $400.
Casuals aren't going to care about who has the better wand with these prices.
Casuals don't care about better anything. I don't think most Wii owners really think "oh, I wish this was more precise." The appeal of the Wii for them is just moving and watch crazy shit happen on screen. Motion Plus is probably to appease nerds and sell more product.
Probably the reason why Natal has a chance of being successful and the Sony wand has none.
Both have no chance of being successful. Developers aren't going to waste much resources for their games on a control scheme for an expensive peripheral that you have to pay for. Maybe some shitty thrown in support for minigames a worse alternate control scheme for future retail games. Most developers won't even bother supporting it. It's a peripheral, anyone who's ever kept up with games knows they never work out unless its very minor put in with a game, like Nintendo has done several times.
Consumers aren't going to go out any pay the price, whatever that may be (probably fairly expensive) for a gimmick and a pack of toy games that come with it and some half hearted developer support. It's no different than a lightgun or anything else thats come along over the years. They're sinking a ton of R&D into something no one is even going to think twice about buying, except the small little peripheral/toy crowd.
Plus when you really think about it, had anyone actually THOUGHT about what it would be like to use Microsoft's thing throughout a game? Shit, you think waggle is bad, try holding up your hands to use an imaginary control scheme. You really want to play a game like that without a controller? I don't think these companies think things through when they do stuff. It's like they're just releasing whatever new tech they can think of to try to combat the Wii's success without really thinking about its relevance. Both sides are going to bomb pretty hard with these things.