http://www.tate.org.uk/whats-on/tate-modern/exhibition/performing-camera
Not very good. A third of the pictures are of unclothed women, which is a bit retro (even if it's often naked women for some other noble purpose). There are lots of dull photos of interesting things (at the time), in black frames. Performances turned into staid archives. And the Tate Modern! Massive amounts of space, very little great art or light or calm to contemplate. Horrid. How about some big rooms with windows in the new bit!?