Why is Nintendo Wii dominating Sony PS3 and Microsoft 360?

[Foshoryuken]

Sky Render said:

Nintendo has not referred to the Wii as "next generation". They've used the term "new generation" in regards to it numerous times, however.

http://digg.com/nintendo/Will_Wright_Wii_the_ONLY_next_gen_console

Some of the best disagree with that.