Rhallus,
Your idea of a PM museum full of old PM items is a brilliant one!
While many here would put it in an old style building, I would prefer it in a building that is very modern and open, like the Getty Center (
www.getty.edu/) in Los Angeles. This could easily be done with Sys X.
And in the alternative, maybe they could offer an old style museum building for those preferring that look (like the Louvre).
Then we could fill each room with an old theme like they do at real life museums that have large enough collections to theme each room. The Egyptian collection at the Metropolitan Museum of Art in NYC comes to mind and could easily be done with PM Egyptian pieces.
And they could still have rooms full of portraits maybe with different sizes of frames and stickers so that we could choose what kind of art to put on the walls. There is a room full of large oil paintings of Venice with its lovely canals and scenes from the 1500-1700 period at the Getty, and this could easily be copied with PM. I will try to add some photos of this room from my visit there last week.
It will fun to see the ideas of others for rooms in a museum using PM! Pgal