I was expecting a bigger thread.
http://www.rockpapershotgun.com/2015/01/22/minecraft-hololens-minecraft-reality/
"Unlike VR headsets like the Oculus Rift, the HoloLens only takes up a small part of your field of vision—depending on where you turn your head to look—as well as voice and gesture commands. Although the office around me and the two Microsoft employees next to me are clearly visible in my peripheral vision, so is the holographic world projected in front of it."
"When I walk towards a nearby desk with a computer, I notice that that Martian landscape disappears beneath it, rather than projecting over it; users can designate areas where they don’t want holograms to appear, which is especially useful if you want to interact with the holograms using a computer."
Yes, this and CastAR seem more appropriate for simulations.