While I’m not inclined to agree that the last important artists were Klein and Fontana (Kiefer? Richter?), there’s no doubt that the transformation of art into a speculative market for the super-rich to park their money in has been detrimental.  There are overvalued artists in every generation, whose work subsequently slips into the dustbin of history, our generation will simply have a much fuller, more ostensibly valuable bin.