Google's hardware event was really all about its AI software

Even though it was billed as a hardware event, Google's product launch Tuesday was really about artificial intelligence, which is now under the hood of almost all the new gear coming out this year. The power of Google's computer brain is a result of all the searching you and everyone else in the world have done on Google over the years. And now the company is using all that data to build a voice-enabled personal assistant, which will debut on Pixel, Google's new smartphone, as well as Google Home, the company's answer to Amazon's Echo. Google CEO Sundar Pichai said they've gotten really good at helping people figure out what they want to know. Google's Knowledge Graph, that small box on the top of search results with the quick answer you're looking for, now holds 70 billion facts, all of which help power its new AI assistant.