President Obama makes his final presidential speech to the nation on January 10, 2017 in Chicago, Illinois.

President Obama makes his final presidential speech to the nation on January 10, 2017 in Chicago, Illinois.

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8 Ways We've Changed Since the Last Time We Had a New President

It was only eight years ago when President Obama took office, but it seems like a lifetime. Smartphones were a luxury. Donald Trump was a reality TV star. Taylor Swift sang country music. Now Obama's hair is graying, Beyoncé is an activist and Uber is a verb. Here are eight cultural touchstones that have informed our politics and showed how we, and the world, have changed.