When I asked if you've ever been to an arcade, I meant, have you ever noticed that the games with the guns you hold are used more than the rest of games there? The Wii Remote will be just like that, standing high above the controller based games.
Sorry if I'm mistunderstanding you, I'll type three responses, some might not apply though.
If you said it's about graphics:
Sony and Microsoft are the only companies that think it's all about graphics. And they think that because they don't know what video games are. Personally I think the focus on graphics has not only increased the costs, but it's also stopped alot of good gameplay. Don't get me wrong, some games have both great graphics and great gameplay. But alot of newer games are worse than the 8-Bit versions. If you buy a PS3 or a X-BOX 360 and you don't have $3,000 to shell out for HDTV, you won't notice any real graphical difference between them and the Wii. Consoles designed for HDTV actually lose alot of quality when on a regular TV. Of course, you might have HDTV, so go ahead. But the Wii has great graphics as well, they might be a slight bit smaller, but they are still great.
If you said Sony and/or Microsoft have more expierience:
Nintendo has been around since 1889, yes, 1-8-8-9. They've been in the video game industry since the early 80's. They have created series that everyone liked, including Donkey Kong, Zelda, Mario and Metroid. They created controllers that could play great games with only two buttons, and they created controllers with over ten buttons that could be easily used. Sony copied the SNES and haven't changed the design since. Sony doesn't even have any good experience in the electronics industry, search for 5 minutes and you will find thousands of complaints about their TV's, NoteBooks, Computer Programs and everything else they make. Sony poorly designs all of their products and designs them to break down easily. Microsoft has expierience with computers and money, they bought out over ten 3rd Party companies and now they just have to sit back as they're games are made for them. Neither Microsoft or Sony have created series that will be played 20 years from now. Halo was not made by Microsoft, it was made by Bungie. It also came out for PC, so it's not exclusive to them. Long story short, if you want experience go with Nintendo.
If you said the controller doesn't matter:
Have you ever used the steering wheel, joystick, light gun or any attachment for a video game? The reason Duck Hunt sold so well is not because of graphics or experience, it was because of its controller, the light gun. The gun made th game interactive, instead of just being hunched over a controller you would actually be doing something. It was enough to make it one of my favourite game on the NES, despite the fact that it went on forever and my score rolled over to zero when I passed its limit. The Wii will redefine games, it will aloow you to have fun while playing instead of just leaning over a controller and getting stressed out do losing at the last minute. And if it's not about the controller, why did Sony copy it?
Again, I might have misunderstood you.