Google announced via her blog for a new system Android Wear and allocated to the wearable devices and which is derived from system android Special for mobile devices as they posted a promotional video for this system.
One of the main advantages of the system android Wear is integrated into the existing voice commands as well as in smart glasses Google Glass, where only via voice command (Ok Google) the user can identify a lot of the information you would like to know as well as many other features.