Just saw a clip on CNN about the Consumer Electronics show in Vegas.
A Gibson Rep had a Guitar that had an extra button near the bottom. When the button was pushed the thumbscrews all started turning. When they stopped 3-4 seconds later, he strummed a "tuned" Guitar.
He said it's great if your in a hurry or don't have roadies to tune it for you. (But you guys all have roadies, right?)