The tech device primarily used for virtual or augmented reality experiences is the VR headset or AR glasses. These devices utilize advanced technology to create immersive experiences that enhance or completely replace the user's perception of reality. VR headsets immerse users in computer-generated environments, while AR glasses overlay digital content onto the real world. Popular examples include the Oculus Rift for VR and the Microsoft HoloLens for AR, both of which have applications across gaming, training, and education.