From Time Magazine:
As President-elect Barack Obama and his family settle into Washington ahead of his Inauguration, they will undoubtedly go through a period of adjustment. The girls will need to get used to a new school, the whole family will learn soon enough about the city’s muggy summers, and Obama may need to become a hockey fan, because the other local sports teams currently range from mediocre to stupendously bad.
The one thing that will be very familiar to the new First Family is city life. Unlike every other President stretching all the way back to Theodore Roosevelt, Obama has spent his entire life living in urban areas.