Considering how long humans have been making machines to increase the efficiency of tasks, it's amazing that we don't have machines that do absolutely everything we could possibly imagine yet.
Obviously there are tasks that just aren't suited to automation, like researching a cure for cancer or responding to the scene of a fire. Sorting out rocks by geological age is not only the kind of task you'd think would be meant for robots, but somebody actually made a machine to do it, and it is, quite honestly, a work of art.