Play Angry Birds with chop sticks. Browse web pages without a mouse or touchscreen. Sign a document within 1 centimeter with pinpoint accuracy. These are just the tip of the possibilities iceberg for Leap Motion, the gesture-control technology unveiled today in the video below. The San Francisco startup says you can “Say goodbye to your mouse and keyboard.” The accuracy of the device may make that claim a reality for some considering that it’s reportedly 200 times more accurate than anything on the market today and can track the movements of all ten fingers inside a 4-cubic-foot space down to…