I bought it, brought it home, and... well, I LOVE it. It really is an experience-changer for gaming. Out of all the game systems I've had (and I've had many), this is truly the best experience I've had gaming. It's really the closest to VR you can get in a mass gaming system.
Not only that, my kids (5 and 8) can both enjoy it along with me - instead of asking to *watch* me play, they can play! That's a different experience in itself.
But until you actually play the games (at least the ones that take advantage of the wii's 3D controller abilities), you probably won't understand what a difference it can make.