Identity will be one of the defining themes in the next five years of the Web. Nearly every site has a concept of a user account, registration, and identity. Searching for "sign in" on Google yields over 1.8 billion hits. And yet, the browser does nothing to make this experience better save for some basic auto form filling. The browser leaves websites to re-implement identity management, and forces users to learn a new scheme for every site... Your identity is too important to be owned by any one company.