Actually if we're talking specifically the HoloLens, I'm going to be attending a meetup for a local developer group in a couple weeks that goes over developing for it and I'm hoping I'll be able to try it as well.
I was thinking more specifically the Oculus or the Vive, though. If those are demoed at the Microsoft stores too, then I'll happily check them out, but I don't know why they'd have them.