In a press release this morning, Sony marked a milestone in sales of the Playstation Move which has reached 4.1 million units sold globally since its release on September 17, 2010. With an installed base of 41.6 million Playstation 3 consoles in the world, the Move has reached nearly 10% of the userbase. It's still too early to determine if that sales figure is good enough for publishers to continue developing Move-compatible software.
Microsoft also released sales figures for their Kinect motion-sensing device today at 2.5 million units sold since its launch on November 4, 2010. Microsoft expects to sell another 2.5 million Kinects during the 2010 holiday season.