I had that same idea but for schools! So they can have students walk through historical events with period accurate models. I think it would be so great to have these kids be first person witnesses to history. Like walking through the streets right before the burning of the library of alexandria. Or walking down the street towards the parade where the archduke gets assassinated. People already do this with vr at tourists spots. All you would need is get it to be mobile and pitch it to schools.