Amazon is reading a pair of smartphones and an audio-streaming device, new leaks claim, with one of the phones using eye-tracking and a glasses-free 3D display for hands-off navigation. The unannounced gadgets are the handiwork of Amazon’s Lab126 hardware division, the WSJ‘s sources reveal, with the high-end smartphone relying upon retina-tracking to allow users to dig through a floating hologram-like interface.















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