Amazon is attempting to take smartphones in a new direction with the Fire. The handset’s four front cameras track your head and eye movements to give objects a more dynamic perspective, whether it’s photos or games. Gesture-based interaction also sets the Fire apart -- you'll tilt and twist the phone to bring up different menus instead of swiping back and forth. Amazon is also packing its nifty Firefly feature, so you can buy whatever you see by taking a picture with your camera. The 4.7-inch Fire is covered in Gorilla Glass with soft-touch sides, making the phone comfortable to hold.