Lewis Bush over on disphotic deconstructs an Official Portrait of Queen Elizabeth II and her grandchildren. He's got a lot to say, some interesting, some less so. My response boils down to "sometimes, Lewis, a picture is just a picture. Or mostly, anyways."
What I noted specifically here, though, is something I never had before. That distinctive Annie Liebovitz look with the people popped off the background by lighting (and, probably, compositing) is incredibly painterly. The background isn't actually out of focus, or just sketched in as a few line, but it is wildly de-emphasized, and often kind of monochromatic.
I feel rather stupid, since in hindsight it's absurdly obvious.