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Nearly 500 smartphone brands have left the market since 2017
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The iPhone 15's system will use two lenses and two sensors. It hasn't been launched on the software side, but is expected in the next few months using the existing hardware.
And it doesn't need to be an eye length apart: the parallax between two lenses can create an accurate 3D image. Apple's AR/VR system will also give a way to view/share the actual captured video, assuming it gets some level of adoption.