Personalizing Light Fields

From the #mediaX2015 Conference “Writing the Code for Personal Relevance”; Gordon Wetzstein, Assistant Professor of Electrical Engineering, and Assistant Professor (by courtesy) of Computer Science at Stanford University, discuss a wide range of unconventional applications that are facilitated by light field technology, a novel inexpensive computational display technology. Light field displays are expected to be “the future of 3D displays,” although many believe that the recent hype about stereoscopic 3D displays is over. One reason why consumers haven’t widely adopted 3D television can be the lack of a unique or useful enhancement of the 2D viewing experience. Wetzstein discusses why it is believed that a new technology - light field displays - delivering an experience that consumers haven’t adopted in the past will work in the future.

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Why do the flickering image in light field display give the 3D effect, I don't understand.