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Hands-on: Microsoft’s HoloLens is flat-out magical



For the second time in as many months, I feel like I've taken a step into the world of science fiction—and for the second time in as many months, it's Microsoft who put me there.

After locking away all my recording instruments and switching to the almost prehistoric pen and paper, I had a tantalizingly brief experience of Microsoft's HoloLens system, a headset that creates a fusion of virtual images and the real world. While production HoloLens systems will be self-contained and cord-free, the developer units we used had a large compute unit worn on a neck strap and an umbilical cord for power. Production hardware will automatically measure the interpupillary distance and calibrate itself accordingly; the dev kits need this to be measured manually and punched in. The dev kits were also heavy, unwieldy, fragile, and didn't really fit on or around my glasses, making them uncomfortable to boot.

But even with this clumsy hardware, the experience was nothing short of magical.

Microsoft calls it holography. I'm not sure if it really is (Wired describes HoloLens' "light engine" as having a "grating," so perhaps it really is using interference patterns to reconstruct light fields rather than providing the same simple stereoscopic 3D found in VR systems), but this is a detail that only pedants will care about. (Though if it is true holography, it should solve the focus issue that many people find with existing 3D systems.)

However it works, HoloLens is an engaging and effective augmented reality system. With HoloLens I saw virtual objects—Minecraft castles, Skype windows, even the surface of Mars—presented over, and spatially integrated with, the real world.

It looked for every bit like the holographic projection we saw depicted in Star Wars and Total Recall. Except that's shortchanging Microsoft's work, because these virtual objects were in fact far more convincing than the washed out, translucent message R2D2 projected, and much better than Sharon Stone's virtual tennis coach. The images were bright, saturated, and reasonably opaque, giving the virtual objects a real feeling of solidity.

Minecraft comes alive

We ran through three interactive demos and watched a fourth. My favorite was Minecraft. I was in a room with a couple of tables and a picture on the wall. After putting on the headset and looking around the room so that the HoloLens could figure out where everything was, the world around me suddenly transformed. The table was no longer just a table. It had a big castle on it, with a river flowing beneath. The middle of the table was no longer there; I could peer through the hole to see the river below. As I moved around the room, I could examine the castle from all angles.

My attention was then turned to a second table which had something of a zombie infestation. Fortunately, the foolish zombies were clustered around a block of TNT. Detonating the TNT blasted through the table, revealing a lava pit below. The zombies toppled through the hole and fell to their deaths.

The picture frame on the wall now housed more TNT. Triggering it revealed a large cavern beyond—and out flew a bunch of blocky bats.

Through it all, the 3D effect was thoroughly convincing. The system felt very low latency; as I moved my head and walked around, the objects retained their positioning in the real world, with the castle, for example, never becoming detached from or wobbling around on the table. While Minecraft of course falls some way short of having photorealistic graphics, the melding of real and physical


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