The art is meant to be interactive. I get that. While looking at Jeff Koons’s Tulips, I realize that the work actually changes in space: as you move around it, the museum lights rotate around the mirrored surface, constantly creating something different. But beyond the artwork itself is something eye-catching in its own way. Everyone holds their mobile phones at-the-ready, snapping photos of just about everything. Most of these photos will rest forever in the purgatory of the