I'm an entrepreneurial software developer, and for the past six months I've been retooling my skills for the burgeoning of virtual reality (VR) and augmented reality (AR) applications. Emerging products like Oculus Rift (Facebook), GearVR (Samsung), and even Google Cardboard are VR head-mounted-displays (goggles) that give a fully immersive experience.
Microsoft's HoloLens is AR, it's not fully immersive, that is, it shows 3D computer graphics superimposed on the real world. (Also it's not really "holograms", Microsoft has co-opted the term). From what I can tell, its much like the well funded stealth startup Magic Leap (http://www.magicleap.com
Its exciting to see Microsoft will include the Holographic API into all Windows 10, so it'll be hardware independent and not only MS HoloLens but Oculus and the others could support it. That means every Windows machine (desktop and mobile) will be 3D VR/AR ready. Separate but related, browsers including Firefox are integrating WebGL so we'll see VR proliferate as easily as websites today (http://mozvr.com/posts/webvr-lands-in-nightly/)
While VR (and lesser extent AR) find their initial enthusiasts in the gaming community, the potential applications reach well beyond. For example, there are a number of virtual chat applications coming out (think 3D Second Life, or even just a Skype where you can look and move around the meeting "room"). More important, any application that presently might use 3D modeling and graphics will be so much more effective using this technology. This is just the very early beginnings and its here to stay. There are many entrepreneurial opportunities to monetize it. Cheers, Jon.