A new visual front end to the Amazon online bookstore (made possible via the Amazon API) provides a user interface to the store reminiscent of a 'real world' bookshop: Zoomii.
Watch the following video, or visit the Zoomii website. What elements of a 'real world' bookshop does Zoomii try to replicate?
How else might 'real world' metaphors be used to enhance visual shop displays?
One way may be to overlay books on a floorplan/map view, using an approach similar to this interactive office plan.