Hedi Slimane made a lot of money for Saint Laurent. But did he leave a legacy?

The rumors have at long last been confirmed that Hedi Slimane is leaving Saint Laurent, the house that he renamed and reinvented. In the four years that the designer served as creative director, Saint Laurent racked up double digit, year-to-year growth and is now a brand with yearly revenue of more than $1 billion. Slimane produced some of the industry's most discussed and debated collections -- beginning with his celebration of California youth culture and indie rock to his final Paris presenta...