Check out Atlas, a robot from Boston Dynamics. The company posted a promo video to YouTube that is the single most impressive example I've seen of how our robot overlords will eventually take over. Hopefully they will be nicer to us than the engineer demonstrating Atlas's abilities to adjust to a changing environment in the video. So human-like is this device that watching the tests/demonstration kicked my empathy into overdrive. Your mileage will likely vary. Atlas can navigate doors (!!) and difficult terrain (including snow, for goodness sake) using internal sensors, LIDAR, and some kind of "stereo sensors." It can also lift (with its knees) and handle those environmental changes I mentioned.
Check It Out: Future Robot Overlord 'Atlas' Takes Movement to the Next Level