Seems like we know quite a bit about this except what it actually does!
I think, like most things, is that there will be a ton of uses for this that will vary across business and entertainment.
One example I can think of is repair or assembly, what if the you look at a piece of gear and it displays the schematics, assembly instructions, troubleshooting guides, etc... Many other entertaining/learning examples I could think of that could be useful.