KDR makes a valid, and highly cyincal point.
We are forced to remember that although gaming is an artform, it is also a business...and games that sell get sequels. Innovative genres get ripped off and copied, and anything deemed risky isn't worth the chance in most developers and publishers eyes.
It is just like movies, we get mostly crappy romantic comedies, and really cheesy action films, because that is what sells in the theaters. And truthfully, would you rather see King Kong or Star Wars in a theater or Magnolia? King Kong/Star Wars will have a bigger effect on the big screen, while the superior film Magnolia will be just as great at home.
And this is basically the analogy of the Wii vs. Xbox 360 and PS3. I do not believe there are very many games that could not be made for the Wii that are being made for the Xbox 360 or PS3. Yes, sacrifices would be made, but the core experience of the game would be the same...and perhaps gameplay even better.
Yet, as a developer and a consumer, look at what can be accomplished with the higher graphical capabilities of 360 and PS3. They are stunning, and if you had to choice of which version you would play, it would always be the nicer looking and sounding of the two. So the Wii misses out on some of the big games like Call of Duty 4: Modern Warfare, and such...however we are getting more original game designs and indie games, because of cost factors, and innovations of the Wii itself. Basically, the Magnolia's of the game world will be just as enjoyable on the Wii if not more than on the big screen.