Google Knowledge Graph - Search Things, Not Strings

When you search, you’re not just looking for a webpage by the search string. You’re looking for something, to get answers, concepts and to explore, i.e. you are searching for things but not just a random string of characters.

Google Knowledge Graph makes the search engine to think more like a human, to understand exactly what you mean and give you back exactly what you want, by collect and understand information about real things in the world and their relationships to one another. Knowledge Graph is to understands "things but not strings" and adds relevant details about your query in the sidebar of your search results. The new sidebar offering a quick snapshot of what you're searching for and to answer basic questions, and also let you explore a topic more deeply.

Try those search below at https://www.google.com (click the bottom right link to go to google US if you redirected to google's country site)

Statue of Liberty

Give you location, picture and basic info, it also give you what other people searching for 

Paris

Give you location, picture and basic info, and also points of interest in Paris

Beatles

Give you basic info, as well as songs and albums by Beatles

Leonardo da Vinci

Give you basic info, as well as works by Leonardo da Vinci

The Hunger Games

Give you basic info about the book, what other books people also searching for, and also suggestion on The Hunger Games movie

Avengers

Give you basic info about the movie, list of stars in the movie, as well as other movies people also searching for

You may also try and compare the same search in http://www.wolframalpha.com, an answering engine by computing the answer based on a vast collection of built-in data, algorithms, and methods (which is also used by iPhone's Siri).