In the retrospective of more than 100 paintings by Roy Lichtenstein, curated by Diane Waldman for the Guggenheim Museum, you can almost cut the atmosphere of deja vu with a knife. Doubtless, part of this is due to the artist's prolonged success in the marketplace; Lichtenstein is a very prolific artist, and his works are in most museums. But their effect has spread far beyond the originals. His images, coming initially out of mass reproduction itself, slide back into it with the utmost ease and have done so for the past 30 years, filling memory with tiny Lichtenstein clones.
Then you...