Sony, Nintendo unveil game offerings at E3

(CNN) -- With the big three gaming-system makers all previewing new or upgraded motion-sensing controllers this week, a new arms race is under way in the video game industry.

Joysticks and push-button controllers seem to be on their way out, replaced by simpler, more intuitive devices -- similar to Nintendo's Wii -- that let gamers move their arms and legs to guide their avatars' movements onscreen.

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