MIT reaserchers have created a low-cost virtual-reality system. From Cult of Mac: “Not only can you reach into the virtual world and manipulate the objects you create there, but there’s a way to connect with others, locally or remotely, to collaborate within a shared 3D virtual space. Looks like all that virtual reality stuff from the late 1990s is coming around again, only with the iPad, an off-the-shelf computing system with plenty of power for this application.”