Robot Patrols Grocery Store to Prevent Slip-and-Falls

We have heard a lot about technology changing tort law in the form of autonomous vehicles. Now Giant Foods is experimenting with a roving robot in its grocery stores.  "Marty" has a number of skills:  he can check prices and help with stocking.  His main job, however, is to scan the aisles for potential slip hazards on the floor.  If the technology is successful, we may have safer stores and fewer tort cases.  PennLive has the story.  Youtube has video.