Where the Galaxy S4 failed with its Smart Scroll eye-tracking feature, this little accessory looks to excel. Attaching the small infrared light emitter to the microUSB port of any Android phone enables users to interact with their handsets just by looking at it. The company’s mobile leader Anders Bo Pedersen went on to demo the Eye Tribe by playing Fruit Ninja, chopping apples and bananas using his eyes, plus scrolling through menu options with a glance. Insane.