This looks amazingly cool, I love the whole concept of AR. I'm an early VR adopter even.
But I really can't tell who this is for.
If I'm in person, I'm going to be be playing with maps and minis and stuff already, and trying to move a tablet around to show everyone where their stuff is seems overly complicated. And if I'm determined to be digital, then we have a few VTTs we could just use?