Snapchat's parent company Snap Inc. has launched the fourth generation of its Spectacles. The new model gets full augmented reality features, combining filters, effects and games from Snapchat with the real world. The 4th-gen spectacles feature dual 3D waveguide displays, two cameras, four microphones, two stereo speakers and a touchpad. However, Snap says it won't be selling this generation of Spectacles, and will only be offering it to AR artists and developers to help improve the product range.