Still in the technical prototype stage, the PS3 Motion Controller uses a wand with a glowing sphere on its tip and a specialized camera to track the precise location and orientation of the controller -- right down to fractions of a millimeter. It's not just a pointing or acceleration device like the Wiimote; it's a "true 1 to 1 translation" of the real world into virtual space.
And, because the technology is wrapped around a camera instead of a sensor bar, it can overlay objects onto video of you in real-time. That means you can hold onto the wand and have it be replaced on-screen with a tennis racket, letting you interact realistically with virtual balls.
That's just the tip of the iceberg. There's nothing better than video to see what these wands can do, so go ahead and watch to your heart's content. When you're finished, head back to and catch yourself up on all the biggest stories of this year's show!
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