Google Glass is perhaps the first Smart Glass that has gained worldwide repercussion. The goggles features augmented reality features, voice recognition, internet access, GPS navigator and applications.
Vuzix Smart Glass is a smart glasses that uses holographic images to allow the user to view a virtual screen of 70 inches from a distance of 10 feet. Very suitable for industrial applications.
Microsoft HoloLens is a Mixed Reality goggle that generates holographic images of virtual objects, allowing interaction between the real and virtual world.
HTC VIVE is ideal for Virtual Reality applications as it generates immersive experiences. It has applicability for simulations and training.