This is still 2d. You can't interact in 3d if it is just projected in 2d. He is just pointing and flying. You don't have to fly between documents if you have a real 3d augmented reality. Apps would be like real 3d objects, you can touch them, manipulate their shapes like you do it with your keyboard or a door-knob, the only difference is that they won't be from real material. So they won't have phisical boundaries, i…
It's quite a scary thought that with a truly 3D/AR computing experience, we might not be able to tell which elements of our environment are Real World and which are virtual. Imagine a virus that injects fake flooring into your vision where instead there is a 40ft fall!
wow, how cool crime sci-fi would that be.. But there are always good and bad things in a new technology. Imagine all that junk that can be saved with virtual stuff when people buy the new and throw away the old.