Why should investors back China in the worldwide robotics race?

China's leadership in the robotics race is increasingly tough to dispute. As if to remove any conceivable trace of doubt, the high-profile demonstrations of cutting-edge wizardry just keep on coming.  Take February's Spring Festival Gala TV show. The surprise centrepiece of the extravaganza was a troupe of dancing droids whose routine included leaps, somersaults, backflips and even a sprinkling of kung fu. Countless headlines duly followed.  A couple of months later, again as if for the benefit of a global audience, robot athletes trounced their flesh-and-blood counterparts in the Bei...