A nice piece on Poster House in Manhattan:
As a medium the poster has always sat somewhere between high and low culture. It is the conduit through which so many paintings have reached bedroom walls during formative years, but also through which visual identities are established — whether through the movies, music or products. It is precisely that position, straddling communication, culture and commerce, which has led to the slipping of this most popular, recognisable but ephemeral medium between the institutional cracks. As mass reproductions, posters lack the aura of art. Yet their authenticity resides precisely in their presence on the street en masse, in their familiarity, reach and reproducibility.