Today Microsoft announced a release window (first quarter 2016) and price (USD 3,000) for HoloLens developer kits, so suddenly HoloLens, and discussion thereof, is all over the Internet again.

Figure 1: Microsoft’s HoloLens.

I’ve already talked about HoloLens ad nauseam, but I found myself several times today trying to explain where (I think) the “Holo” in HoloLens comes from, and what HoloLens has to do with actual, real, honest-to-goodness holograms. Continue reading →