Hip-hop was poised to conquer fashion. Why did it stop short?

Bubbles and fizz float on the surface of "Fresh Dressed," an exuberant documentary about the history of hip-hop fashion. Young black men swagger through their frayed neighborhoods wearing vintage Ralph Lauren shirts; creative souls show off hand-painted denim jackets; and, street-style icons extol the primacy of Lee jeans and Cazal sunglasses on the short list of cool togs.