People really don't like the concept that I can see a world they can't experience. Some people become offended. Making people feel comfortable has a long way to go, but as you mention kids start with no preconceived notions so this may not be a stigma for future generations.
This is the /exact/ kind of elitism that killed Google Glass. The whole "I have this and you don't" mentality is childish and damaging.
When I use my Google Daydream, being able to "cast" my screen to a TV and it really helps with this feeling as everyone else can watch along.
If the cost didn't increase too much, I feel that an onboard camera that can overlay what the user is seeing to show a 3rd party could help with that feeling. (Or if it already has a camera onboard, perhaps some better software to make casual sharing of your perspective easier)
Microsoft did an awesome job with providing built-in tools and the vast majority of MIT open source hololens examples.
It's very technical and dev heavy, it would be great to see an app that will provide the streaming feature without the admin pairing currently necessary for the "server" access.
Two things you can get from live-feed-aug'd VR that you can't get with current thru-glass AR solutions (maybe hololens is different?):
1. The "color" black (and true opaque objects)
2. Wide field-of-view (FOV)
The first is a physic limitation of thru-glass AR implementations; it's not likely to be different any time soon. The second I would expect to over time be improved.
The downside of a live-feed-aug'd VR system is resolution - the resolution of everything is not high enough to be what people want. While I doubt the resolution of an AR system is any better, because the FOV is smaller, and a thru-glass view system is used instead of a live feed, it becomes much less of an issue.
I demo'd google cardboard VR to a bunch of kids (prob about 200 ish) who thought it was amazing. They really enjoyed it and the feel from teaching them using VR was that this was another tool people will use in the future.
Kids are already wired up with headphones, phones in pockets, phones wired to external battery boosters. I say this because I thought cumbersome cables from phone to goggles would be a no no and the technology would have to wait for a wireless solution. But I think I am wrong, kids already have cables snaking around their bodies.
Personally I think external cameras that can show 'the outside world' inside the VR world is the future. I'm interested in your thoughts on AR... this I see as a great tool for industry, but not for the general public?