“Massive Change,” Bruce Mau’s much-anticipated, optimistic but uneven new show on the future of design, has arrived. “The exhibition doesn’t set out to map the future of design in any way one might expect…. (It) maps, instead, the often invisible design of things such as the global market economy, advances in medicine and agriculture, systems of ecological renewal and human transport. Every activity mankind engages in, everything that leaves our material stamp on the world, must be contemplated as a design project, says Mau. And we have choices.”