Minimaforms presented Petting Zoo, an interactive display designed to respond to human touch and movement. Using a Kinect camera and software designed to respond with emotions, the exhibition provided three "pets" with three different patterns of responses and a basic machine learning allows each to develop behaviors based on input from the situation.
According to Business Insider, there is an estimated 14.3 trillion pages on the Web. I can't find any reliable data on how fast that's growing, but this is in less than two decades and the speed at which we are adding to this is only increasing.