The technology is said to fit even in small devices. Just as some Sony camcorders (and others) can project their 2D video images onto  a white wall or screen, this tech could be used in smart phones or tablets to project 2D or, they say, even 3D content. I do not yet understand how the technology works, but there is evidence that multiple companies are working on bringing this tech to smart phones and tablets within 1 to 2 years.

New Technology Emerges to Greatly Advance Pico-Like Projectors & Deliver 3D Holographic Images by Late 2015 – Patently Apple.

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