Well... it is a gimmick. Graphics and processor power isn't up to snuff with the other 2 consoles that are next gen, all they have is the new fangled wiimote. That screams gimmick to me.
Sales will start to lose steam come mid year 2008 for the Wii.
My pokemon brings all the nerds to the yard. And they're like, "You wanna trade cards?" Damn right, I wanna trade cards. I'll trade this, but not my charizard.