I'm from Denmark, if I can be of any help translating or explaining anything please don't hesitate to ask.
Of the top of my head, and without having read any of the articles that are linked to this thread. I believe the reason for the exibition being held in Den Gamle By (The Old Town) is, that they (at the time) resently finished constructing a street from the year 1974. For those of you who don't know - Den Gamle By - is a museum. It's built like a small town, where you can walk through the streets of different historical periods. All the buildings are original houses that were taken down