Motion-detection will be big for the future direction of Microsoft, as it reacts to the Nintendo Wii, which revolutionized the game console industry with its motion detection technology. Despite the outdated inferior technology of the Wii (it even doesn't support HD resolutions) it became an inmense sales success because of its controllers with motion-detection technology.

Microsoft denied the rumors last week, but a report surfaced last week that Microsoft was buying 3DV Systems, as Venturebeat.com reports.

3DV has developed its so-called ZCams, the cameras do function much like Sony’s EyeToy, but they’re much more accurate at detecting motion. That’s because they’re 3-D depth cameras, which sense how far away an object is from the camera.
In the camera’s black-and-white imaging, the closer objects are lighter & the more distant objects are darker. The camera captures the locations of objects many times per second, so it can detect an object and its trajectory, making it perfect for game control purposes.