After reading this article and watching the video attached in it, I wondered if a plasma hologram is really as three dimensional as they say. I would say the hologram is only three dimensional if you can walk around it, and see the image from different angles as you walk. But is this really the case when walking around a plasma hologram, as it seems more like a 2D image projected mid-air. Next to that, looking to the setup shown in the video, I would say it is not even possible creating a '3D plasma hologram' using that setup.
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Even if the hologram was two-dimensional, you could still walk around it. If you consider a piece of paper to be nearly two-dimensional, it's not like you can't walk around it. Defining something to be 3D with your definition would be misguided.
If you are asking whether the hologram can itself have depth (i.e projecting a sphere), I see no reason as to why it cannot. Second paragraph http://gizmodo.com/new-laser-projector-makes-3d-images-that-hang-in-mid-ai-1652174565 explains how this process works. It doesn't look like there exists any limitations to focusing pulses in an arrangement that produces 3D objects.
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No the question was not in that sense if you could walk around it, but if the image would be 3D if you walk around it. I was asking if the hologram itself has depth. Thanks for the answer. – P.Yntema Sep 14 '16 at 12:44