Not sure how new this is but it’s certainly unusual for a fashion photographer of this caliber to have a personal website this comprehensive (here).
This growing trend among top photographers I attribute to google searches that will turn up all kinds of strange and possibly unwanted results (and other steven klein’s of the world) if you don’t have a site dedicated to your work online. Also, growing the fan base is always a good idea.
From Steven’s artist statement: “Portraiture in the past has been regarded as a documentation of a person but for me it is a documentation of the encounter between myself and the subject. It is not meant to reveal them, nor is it meant to subject them to an X-ray; it is a departure from that.”