While Nintendo kicked off the motion control revolution four years ago and quickly dominated the field, Microsoft and Sony are betting there’s a lot of life — and money — left in the category.

Last Sunday, Sony’s new PlayStation Move controller went on sale and in November Microsoft will launch Kinect, it’s motion-tracking camera that essentially transforms players’ bodies into the controller. Both products are gambles — and, to some degree, risks — for the companies, who are hoping to keep the current generation of video game systems relevant for several years.

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