For AR/VR, https://youtube.com/c/SadlyItsBradley is cringe, but he has solid supply chain info leaks about upcoming products and a surprisingly good understanding of the technology. Meanwhile, https://kguttag.com is by far the best place to learn about the many fundamental unsolved problems that are preventing the grand vision of metaverse AR glasses from being realized anytime soon, and the reality of what upcoming products will be like as they work around those problems in various ways.