An insomniac footnote to the thought below
When I wrote about an ontological mirror Lacan was obviously lurking somewhere. Perhaps what I meant was that the stable object offers an ideal phantasmatic image of a complete, integrated body as in the 'mirror stage', whereas works that change in time or space seem to be closer to the pre-mirror stage 'fragmented body' or 'corps morcele'
To connect this, briefly, to John's post, Zizek has written about the relation between Lacan and Quantum Physics
> "In the gallery it presents a kind of ontological mirror reflecting
> back and stabilising our own sense of self in its apparent stability
> and autonomy... By contrast time-based art, interactive art, and all
> art involving some form of interaction over time tend to do the
> opposite. Perhaps this may be a partial explanation of the continued
> resistance to such work in mainstream institutions."