Why man and machine must work together as Watson AI infiltrates media buying

Last week IBM announced that they have been using Watson (their AI intelligence programme) with success in buying programmatic media, quoting that they had seen significantly increased performance as a result.
In their example, IBM claimed a reduction in cost per click by as much as 71% - impressive stuff.
But it should come as no surprise that Watson is capable of optimising media against a KPI better than any human or algorithm can. After all, Watson has far greater processing power than any o