You know how Microsoft always show its Hololens AR visor like its the holodeck from Star Trek? Yeah, it's nothing like that. Here's what you're really getting:

Not quite the swirling cloud of immersive augmented reality presented when they get that fancy camera rig out at shows. And definitely not this, then:

I'd heard the field of view was restricted after a few E3 hands ons, but seeing it in action actually disappoints me a lot. The visor design gives the impression that far more of the 'lens' bit is in use, but the reality is that the shiny digital future promised is only happening in a restrictive post-it note sized area right in front of your face.

I took the above GIFs from the video below showing a trial of Hololens in medical research at the Western Reserve University. It's impressive technology from a work standpoint, but the entertainment/gaming/home use seems a lot less fun with that viewing window.