Today, as social media continues radically to transform how we communicate and interact, I can't help thinking with a heavy heart about The Woman in Blue. You see, in the networking age of Facebook, Twitter and Foursquare, the social invisibility that Vermeer so memorably captured is, to excuse the pun, disappearing. That's because, as every Silicon Valley notable, from Eric Schmidt to Mark Zuckerberg, has publicly acknowledged, privacy is dead: a casualty of the cult of the social. Everything and everyone on the internet is becoming collaborative. The future is, in a word, social.