How advanced is hologram technology?

Hi, this question was inspired by this article about military hologram technology. It made me wonder how advanced hologram projection really is and how much of it is faked. Searching through Google and Wikipedia has left me confused. Holograms seem to be a technology that never shows up in the news. And I’m not talking about the 3DS. That’s the kind that’s confined to a screen. I mean things like what you’d find on Star Trek or Star Wars.

I believe this is real…

…but this seems to be fake or maybe an illusion.

Anyone have other examples of holograms that may or may not be real?