Amazon working on 3D smartphone

Amazon has recently been developing a wide-ranging lineup of gadgets—including two smartphones and an audio-only streaming device—to expand its reach beyond its Kindle Fire line of tablet computers, WSJ reported, citing informed sources.

One of the devices is a high-end smartphone featuring a screen that allows for three-dimensional images without glasses, these people said. Using retina-tracking technology, images on the smartphone would seem to float above the screen like a hologram and appear three-dimensional at all angles, they said.

Users may be able to navigate through content using just their eyes, two of the people said.

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