The document discusses augmented reality (AR), virtual reality (VR), and holograms. It then describes Microsoft's HoloLens headset, which allows the user to see holograms overlaid on the real world. The HoloLens combines advanced processing with untethered use, and will run on Windows 10 with specialized apps for areas like gaming, design, education, and more. The conclusion is that the HoloLens represents a revolutionary breakthrough that is well-suited for the future of computing.