User:Toussaint/compiz and second life

If a MMO virtual world like Second Life is suitable enough for an avatar, then why not Compiz and a 3D file manager?
 * A 3D file manager can deconstruct or reform the idea of a user's home as residing on a third-party server. It would visualize the avatar, or the avatar's finger, as a 3D mouse pointer which can fly around and access the floating 3D icons of files. P2P file sharing clients would also allow users to peruse other users' files using their avatars.

However, if we can navigate around a 3D, sculpture-centric environment just as well as how we can navigate a 2D, document-centric environment, then what type of device should be used for inserting basic sculptural data in the same way that we can insert basic documentary data with keyboards?