The document discusses virtual reality (VR) experiences on the open web compared to closed VR systems, and some early experiments with VR on the web. It notes that while VR today relies on closed platforms, the open web may enable high-quality VR without downloads by using technologies like WebGL, WebSockets and browser extensions. It also introduces some VR experiments built with tools like vr.js, Three.js and GLAM that allow VR experiences to be built for browsers.