About the Wii... I don't own one on grounds of Nintendo hating my country's guts and thus it costing about US$ 600,00 (and it's not all taxes, PS3 and 360 are about US$ 800,00 each... more expensive, sure, but at a different proportion). However I did get the chance to play one. More than once. In a friend's house. (EDIT: Both Nintendo and Sony didn't bother to officially launch their consoles in my country, making it even technically illegal to own one... and not having tech support for either. So I may be partial to Microsoft... but I don't care about the 360 either)
So... first off. The Wii really sucks really hard. After all the praise I got from my friend and from the industry about it's motion sensor technology: It just doesn't work. Precisely as Yahtzee said. Not only it captions your movement very poorly, it does so about a second after you prompt your command, so basically it's just like you're the one doing the movements, if you needed precognition to know what is about to happen because you're 1 sec out of sync with everything.
People say the Wii appeal to non-gamers to introduce them to gaming. I say this is bullocks, bullshit, and whatever more you want to call it. The vast majority of Wii owners only have one game: Wii Sports, the one that came with it. And they're very happy to have only that. From the ones who own more than one game, most still only owns two or three, because they took a shot, got another game, probably saw how absolutely worthless it was (more likely than not, considering it is the Wii and only a handful of Wii games are even tolerable) and completely disassociated themselves with games forever (save Wii sports). Finally, the sloppy controls are only giving these people the impression that games are still the same as 25 years ago... when they weren't that great and the controls were sloppy.
Bottom down, as much as the Wii is helping the gaming industry, it is harming much more the gaming COMMUNITY, giving argument to the mentality that games are only for children (and retarded children at that).