Creative works are ultimately embedded in physical world. If our exploitable physical world is limited, there is indeed an upper limit to the value of creative works.
Just like we're facing the prospect of peak oil, is it really hard to imagine that we could face the prospect of physical limitations imposing themselves upon creation and distribution of creative works?
You're absolutely right. The limits of the physical world certainly impose limits on the physical creation and distribution of creative works.
With that said, is it perhaps possible that creation and distribution might not quite be the same as value in every scenario? A given mass of aluminum can be formed - and recycled - into a functionally infinite series of unique artistic works. I can see no reason why the hard limits of the physical world you so wisely point to would inherently force an upper limit on the value of the artwork.
Have I misinterpreted you? Or perhaps I fail to understand your points correctly. Can you help me? I seem to have suffered a failure of imagination.
Just like we're facing the prospect of peak oil, is it really hard to imagine that we could face the prospect of physical limitations imposing themselves upon creation and distribution of creative works?