Augmented reality headsets are not typically considered virtual reality headsets because they do not fully immerse the user in a virtual environment.

Presence is the feeling of being physically present in a virtual environment.

Social networking is not a common application of virtual reality because it is difficult to create a truly immersive social experience in a virtual environment.

Haptics is the technology that allows users to feel virtual objects in a virtual reality environment.

Cost is not a common challenge associated with virtual reality because the price of VR headsets has come down significantly in recent years.

A game engine is a software platform that creates a virtual reality environment.

Role-playing games are not typically considered simulated worlds because they do not allow users to interact with the environment in a realistic way.

Augmented reality is the technology that allows users to see virtual objects in a real-world environment.

Gaming is not a common application of augmented reality because it is difficult to create a truly immersive gaming experience in an augmented reality environment.

Motion tracking is the technology that allows users to interact with virtual objects in an augmented reality environment.

Cost is not a common challenge associated with augmented reality because the price of AR headsets has come down significantly in recent years.

A game engine is a software platform that creates an augmented reality environment.

Holographic displays are not typically considered mixed reality because they do not allow users to interact with virtual objects in a realistic way.

Mixed reality is the technology that allows users to see virtual objects in a mixed reality environment.

Gaming is not a common application of mixed reality because it is difficult to create a truly immersive gaming experience in a mixed reality environment.