Hololens is not perfect! Interesting link here

I want to get the hololens and write an app for it that just shows a depth view (since it contains at least 1 Kinect), so I can use it as a short range night vision headset. :)

Both CastAR and Hololens are quite interesting. I'd like to get both.

Although as additive light devices both are limited to only rendering things that are brighter than the background (for example, the hololens can't render black text over a white wall). So no horror games with dark shadows moving around your room. :(