In this valuable book, Danto is not speaking of the death of art as one might speak of the death of God. When he speaks of 'the end of art', he is speaking about the end of art history as we know it and have thought of it; the way of viewing art history that we were taught in 'The History of Western Art 101'.
"To say that history is over is to say that there is no longer a pale of history for works of art to fall outside of. Everything is possible. Anything can be art. And, because the present situation is essentially unstructured, one can no longer fit a master narrative to it....It inaugurates the greatest era of freedom art has ever known. (p.112)"
The history of art up to this point has been a history of exclusion, legitimizing and highlighting only certain works which fall within the pale of this narrative. Danto's point is that there is no longer a pale of history.
But it is possible, I believe, to see something even larger in Danto's analysis, something that would be interesting to pursue by someone with a good grasp of history and culture. One might see further into his thesis and find that the history of art has been one of an evolution of individuation. Starting from the Egyptians, where art was an umbrella covering the entire culture, a culture in which the individual was of little value, to our present age in which art has moved to the opposite extreme, no longer controled by anything or anybody (except perhaps the art industry itself), heralding a new stage ( about 1964 by Danto's reakoning) in the idividuation of the planet.
If, as Teilhard de Chardin says, the impulse of evolution is toward greater consciousness and greater complexity, then what we are seeing at the present time is not something unstructured (as Danto posits), but rather, something of far greater structure, something much more complex than we have witnessed before. A stucture and complexity perhaps presently beyond our comprehension. (Of course, the conservative view of this will be that we are witnessing an encroaching chaos that will destroy civilization as we know it.)
From this new perspective, the present radical pluralism would be, rather than an unstructuring, a further step toward something of a far deeper order, an order we have not seen before, one which reflects an important moment in the individuation of humanity on this planet. Taking Danto's basic thesis, one might write a new history of art from the point of view of the evolution of individuation in art. But then this would be another master narrative and would undermine Danto's thesis. Or would it? For this is not a master narrative of art but of evolution itself as evidenced in art.
And who better to herald this advance than the artists!