“Sure, you can get a universal remote control to change TV channels, your stereo, Apple TV, even your lights, but what if you could do all that just by lifting your finger? Eyesight Technologies’ Singlecue uses a camera to track the movement of your finger, and then relays those commands to your home entertainment system. I went hands-on with this device, available for $199, to see how practical it was for high-tech couch potatoes.”