This could be a rather expensive fall. Joystiq has an article describing the alleged confirmed Wii launch lineup. 27 games is damn impressive. At this point it is hard to say what I will get, but I would have to bet on Madden 07 if the control is innovative, Wii Sports, Zelda Twilight Princess, and maybe something else that makes innovative use of the controller.
It is still early days, but I fully expect to get a Wii. With my love for games, for Nintendo, and two kids, I think a Wii purchase will be money well spent. I want access to the old classics, but I want some innovation as well, so anything that is family (or sports) oriented that makes use of the new controller in interesting ways will find its way into my gaming library.