What does MR stand for reality?

With all the hype around the metaverse these days, many people are asking for definitions of the acronyms flying around — VR, AR, MR, XR. If you’re confused, it is not your fault. The industry has not been precise, often using incorrect, overlapping, and conflicting language. To reduce the confusion, Big Think asked me to provide some historical context and helpful definitions.

It’s all immersive

At the top of the pyramid is the phrase immersive media, which refers to digital content presented to users from a first-person perspective, providing the illusion that users are present within the content rather than observing the content from the outside. It is this sense of presence that is the common denominator among VR, AR, MR, and XR.

VR vs. AR

The two pillars of immersive media are virtual reality (VR) and augmented reality(AR). Both phrases have been around for decades, with VR emerging in the late 1980s and AR following in the early 1990s. The difference between VR and AR is where the user feels present. In virtual reality, the user feels present in a fully simulated environment, while augmented reality makes the user feel present in a combined world of real and virtual content.  

To achieve a true VR or AR experience, the user must be able to interact with the virtual content in a natural and immersive way. This distinguishes virtual reality from 3D simulations and movies. This also distinguishes AR from “heads-up displays” (HUDS), which simply project data and images into a user’s view of the real world. So, within that context, here are some definitions:

Virtual reality (VR) is an immersive and interactive simulated environment that is experienced in the first person and provides a strong sense of presence to the user. 

Augmented reality (AR) is immersive and interactive virtual content spatially registered to the real world and experienced in the first person, providing a strong sense of presence within a combined real / virtual environment.

Enter XR and MR

For decades, VR and AR dominated the field, but in recent years, additional phrases have become popular. For example, extended reality (XR) has been promoted by hardware and software makers as they began to produce systems that support both virtual and augmented reality. Rather than use the cumbersome language “virtual and augmented reality,” the phrase “extended reality” has become a convenient catch-all to refer to systems and products that target both.  

The term mixed reality (MR) has also become popular but causes some confusion because it is essentially a synonym for augmented reality. For many years, AR was the primary term of art in academia and industry, but when Microsoft launched the HoloLens in 2016, it used “mixed reality” in its marketing language, which helped popularize MR and make it interchangeable with AR. People often look for ways to differentiate, but the term is just a matter of preference.

Additional confusion has emerged recently as some companies are pitching “smartglasses” using imprecise marketing language, describing products as augmented reality or mixed reality when really it is just a “heads-up display” that introduces flat data and images into the user’s line of sight. Such devices are useful for many things but cause confusion in the marketplace when compared to true augmented reality headsets like Microsoft’s HoloLens and Snap’s latest Spectacles.

The metaverse

To add to the confusion, the term “metaverse” has suddenly become wildly popular, largely due to Facebook changing its name to Meta and promoting support for the language. This phrase has its roots in science fiction, going back to the early 1990s but wasn’t used by the industry in a significant way until Facebook put its marketing muscle behind it. It can be defined as follows:

A metaverse is a persistent and immersive simulated world that is experienced in the first person by large groups of simultaneous users who share a strong sense of mutual presence. It can be fully virtual and self-contained (a virtual metaverse) or it can exist as layers of virtual content overlaid on the real world (an augmented metaverse).  

Some academics believe a metaverse must also include rules of conduct and a functional economy. While many embodiments will have such features, I do not believe we should narrow the definition in this way. Similarly, some believe that all virtual worlds will be connected into a single interoperable metaverse, with goods and services shared between. While it is likely that many worlds will connect, some worlds will stand alone and will still meet the definition of a metaverse.  

All in all, immersive media is a rapidly developing field with many overlapping words and phrases. To provide clarity, I created the graphic below:

Credit: Louis Rosenberg

Looking forward, all these phrases (VR, AR, MR, XR, and metaverse) will continue to be used extensively by the industry and often imprecisely. For example, every virtual environment is not a metaverse, and every pair of smartglasses does not provide an augmented reality experience. That said, the industry will surely get more precise as the market matures and consumers become more sophisticated. Until then, hopefully these definitions help provide some clarity.

Augmented reality (AR) adds digital elements to a live view often by using the camera on a smartphone. Examples of augmented reality experiences include Snapchat lenses and the game Pokemon Go. 

Virtual reality (VR) implies a complete immersion experience that shuts out the physical world. Using VR devices such as HTC Vive, Oculus Rift or Google Cardboard, users can be transported into a number of real-world and imagined environments such as the middle of a squawking penguin colony or even the back of a dragon.

In a Mixed Reality (MR) experience, which combines elements of both AR and VR, real-world and digital objects interact. Mixed reality technology is just now starting to take off with Microsoft’s HoloLens one of the most notable early mixed reality apparatuses.

Extended Reality (XR) is an umbrella term that covers all of the various technologies that enhance our senses, whether they’re providing additional information about the actual world or creating totally unreal, simulated worlds for us to experience. It includes Virtual Reality (VR), Augmented Reality (AR) and Mixed Reality (MR) technologies.

Written by Nancy Gupton. September 21, 2017. Updated by Patrick J. Kiger, January 6, 2020.