We have covered a bunch of smart glasses from Epson in the past. The Moverio BT-300 is a pair of Si-OLED powered augmented reality glasses that blends digital content into the world around you. This pair seems less bulky than the BT200, so it should be more comfortable to wear. You get head tracking sensors and front facing cameras for augmented reality.
BT300’s dual displays let you experience 3D content. You get a 5 MP camera, improved nose and cable design, and an OLED display that supports better colors and images. More information is available here.