I could be wrong, but IMO you and bane are both confusing "holography" with "3D display", and/or "display that involves depth". The author of the article made a similar mistake, and unfortunately a lot of commercial products are mislabeled as "holographic", so this is unsurprising.

As bane said, holography is a very specific thing. Most of the products I'm aware of today that claim to be "holographic" are things like head-up displays and red-dot gun sights. They use optics to make it appear as though a 2D image is appearing some distance behind the display surface. It's a clever, useful effect, but it is not holographic.

I think the author of the article is also leaving out one of the main interesting potential uses of depth-sensing cameras, which is to feed the output into a 3D printer. You don't need a holographic display (or even a faux-holographic depth display) for that.