New challenges for Nintendo

The Nintendo Wii, the motion-control darling of the video game console world, faces new challenges and questions about its future like never before.

The industry-leading hardware has been the hottest gift three holiday seasons in a row since it was released in November 2006. This summer, the Wii topped 50 million consoles sold worldwide, making it the fast-selling console ever.

But in recent months, sales have fallen off and holiday supplies are plentiful for the first time, removing some of the cachet of being a sold-out product. Some independent game publishers are restless as well, unhappy that they aren't having the success on the platform that Nintendo's games are.

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