Microsoft's most impressive and strange project right this minute is the augmented reality headset "HoloLens." This headset was first introduced back in January at the big Windows 10 event. We've had the opportunity this week to go hands-on and eyes-on with the newest iteration of this once-tethered headset at BUILD 2015, Microsoft's developer conference, and have produced one massive hands-on feature. For those of you wish a slightly shorter attention span, there's the article you're reading right now. This is Understanding HoloLens in 5 steps.