Microsoft HoloLens is shaping up to be another formidable competitor in the HMD market. Unlike VR tech, Microsoft based their display on holographic technology. The original Hololens was more proof of concept than consumer device, and the recently announced Hololens 2 is again eschewing the public in favor of enterprise/government uses. The Hololens 2 will feature upgraded visuals, including a much-expanded field of view — music to fans of the original device, who settled on the limited FOV as the main drawback of the device. https://www.youtube.com/watch?v=UlQt4HNIFXE&t=1s
Modern virtual reality headset displays are based on technology developed for smartphones including: gyroscopes and motion sensors for tracking head, hand, and body positions; small HD screens for stereoscopic displays; and small, lightweight and fast computer processors. These components led to relative affordability for independent VR developers, and lead to the 2012 Oculus Rift Kickstarter offering the first independently developed VR headset.
This may seems like a lot of effort, and it is! What makes the development of virtual reality worthwhile? The potential entertainment value is clear. Immersive films and video games are good examples. The entertainment industry is after all a multi-billion dollar one and consumers are always keen on novelty. Virtual reality has many other, more serious, applications as well. https://www.youtube.com/watch?v=90nDMSIgt7I&t=1s
In medicine, simulated VR surgical environments under the supervision of experts can provide effective and repeatable training at a low cost, allowing trainees to recognize and amend errors as they occur. Virtual reality has been used in physical rehabilitation since the 2000s. Despite numerous studies conducted, good quality evidence of its efficacy compared to other rehabilitation methods without sophisticated and expensive equipment is lacking for the treatment of Parkinson's disease. A 2018 review on the effectiveness of mirror therapy by virtual reality and robotics for any type of pathology concluded in a similar way. Another study was conducted that showed the potential for VR to promote mimicry and revealed the difference between neurotypical and autism spectrum disorder individuals in their response to a two-dimensional avatar. https://www.aliexpress.com/item/360-Degree-Rotating-Tie-Rack-Belt-Hangers-Scarf-Holder-Hook-for-Closet-Organizers-Home-Hanging-Necktie/32962345186.html
But the competition is closer than ever. Vive is also excellent (and still offers the best room scale), while the Sony PlayStation VR is a big seller thanks to its significantly lower price and the ubiquity of PlayStation 4 consoles ready to run it. There are now better standalone VR headsets too if you want a hassle-free route to the immersive realms. https://www.aliexpress.com/item/Cover-Mobile-Phone-Case-For-Coolpad-Note-5-Lite-5-0-inch-Frosted-Matte-Design-Hard/32826926530.html
Although we talk about a few historical early forms of virtual reality elsewhere on the site, today virtual reality is usually implemented using computer technology. There are a range of systems that are used for this purpose, such as headsets, omni-directional treadmills and special gloves. These are used to actually stimulate our senses together in order to create the illusion of reality. https://www.youtube.com/watch?v=iNWHHhIsE00&t=1s
VR can simulate real workspaces for workplace occupational safety and health purposes, educational purposes, and training purposes. It can be used to provide learners with a virtual environment where they can develop their skills without the real-world consequences of failing. It has been used and studied in primary education, military, astronaut training, flight simulators, miner training, architectural design, driver training and bridge inspection. Immersive VR engineering systems enable engineers to see virtual prototypes prior to the availability of any physical prototypes. Supplementing training with virtual training environments has been claimed to offer avenues of realism in military and healthcare training while minimizing cost. It also has been claimed to reduce military training costs by minimizing the amounts of ammunition expended during training periods.
The newest breed of mobile headsets can also be considered "tethered," because instead of inserting your phone into the headset itself, you physically connect your phone with a USB-C cable. Qualcomm has been emphasizing the VR and augmented reality capabilities of its Snapdragon 855 processor, and is promoting a new ecosystem of XR viewers (including both AR and VR devices). These use the aforementioned USB-C connection to run all processing from a smartphone, while keeping the display technology built separately into the VR headset or AR glasses. https://www.youtube.com/watch?v=jLtcPTm5dTg&t=1s