I've tried the HoloLens a couple of months ago, but it was quite heavy on my nose. I'm sure there must be some accessories that take some weight off...
It was a fun experience, though watching others wearing it and wandering around the house, checking up on invisible things and shooting invisible aliens was even better.
haha yes, I haven't used them myself but I can imagine that the experience would be fun. The HoloLens is only among the first generation of AR devices. Imagine what 2-3 generations down the could achieve.
In the future, we may have AR devices that weigh no more than a regular sunglass. In fact, they make incorporate the technology in a regular sunglass!
That would be so awesome :D