Gentrification is the process of turning old, decaying neighborhoods (normally housing minorities) into new, exciting rich communities (and displacing the original residents as a result). This is done by installing a few key features like art galleries and expensive restaurants. Then the city increases property taxes slowly which in turn increases rent. In the end people eventually can't afford to live in their own homes. They move out (does this remind you of the gov't's policy for dealing with Native Americans in the 1800s?) and in move the rich, white people.