There’s been a lot of buzz in the Apple blogosphere over a patent for 3D head-tracking. Apple recently filed for a technology that allows users to move an object (on a computer screen) by simply moving their head or body. There’s no need for a mouse or keyboard any more; just look behind an image and it will rotate with you. To help visualize this, Software Advice put together a video of how this could be used in 3D modeling: