Thalmic Labs has announced a very cool device called Myo, an armband that allows you to use gestures to control your Mac, PC, iOS, or Android device without cameras. It measures electrical activity in your muscles and uses it to interpret arm, hand, and finger gestures as commands for your device. It's being offered for $149 for preorder, and it's scheduled to ship sometime later this year. Check it out, it's very cool.
Check It Out: Gesture Commands for Mac, PC, iOS, Android with Myo Armband
