- Urban neighborhoods in cities like London and New York are changing rapidly
- Young and creative communities have popped up in once working class areas such as Dalston and Williamsburg
- Some say the speed of change is upending neighborhoods and pricing out long time residents
- Others say it is regenerating long neglected areas for the better
London (CNN)A little over 30 years ago, Dalston was just another gritty, working class neighborhood to the northeast of central London.