There remain a handful of technologies that we all wish would just go mainstream already. Jetpacks, for example. Teleportation. And 3-D project holograms — the Princess Leia kind. Heck, we’d even settle for the low-res, two-tone version we saw in the movie.

Good news, Obi-Wan. Researchers are working on 3-D holographic projectors, and this past year, we saw more progress than you can shake a lightsaber at. Here’s a round-up from 2014.41

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