What happened to art criticism?

"Art criticism was once passionate, polemical and judgmental: now critics are more often interested in ambiguity, neutrality, and nuanced description. And while art criticism is ubiquitous in newspapers, magazines, and exhibition brochures, it is also virtually absent from academic writing. Here, James Elkins surveys the last fifty years of art criticism, proposing some interesting explanations for these startling changes."--Jacket.