This document discusses various topics related to wearable accessories, sensors, and smart devices in the Android ecosystem. It provides examples of devices like the EMOTIV INSIGHT brain monitoring headset, smartwatches like the Sony Smartwatch 2, augmented reality glasses, and an augmented reality tablet. It also discusses topics like connecting sensors to Android, using MQTT and Webinos for device communication, open source home automation with openHAB, and the Raspberry Pi NXT robot interfaced with Android.