The Labyrinth gameplay used the Xoom's built-in gyroscope to control the game board, and it took most people a while to get used to making small corrections in the Xoom's orientation to make it past the first hole.
Willow Garage's TurtleBot is aimed at the hobby market, and can be trained to perform different tasks. Originally, it used a Kinect sensor, but the model here that's following around a Google I/O attendee runs on Android with the ADK. Although the current ADK is limited to USB connections, it will soon support Bluetooth, says Google.
The ADK is used here by Yoshinari Yoshikawa, founder and CEO of Miselu, a Silicon Valley-based company that is working with keyboard maker Yamaha to develop automated piano controls with Android and the ADK.