He's probably talking about SUN's "Project Looking Glass". I saw the video about a demo they had at a conference, they didn't offer much details about the advantages of moving to this new OS aside from getting some nice 3D desktop. Windows might not be the best OS out there, but it's going to take more than just a pretty 3D desktop to convince the crowds to move over to some new OS. Now that SUN has presumably joined forces with Microsoft, the chances of "Looking Glass" to reach the stores have turned very slim.