Larry Garfield (@Crell), who is the "Web Services and Context Core Initiative Lead", talks to me about WSCCI and how it will fundamentally change the way Drupal's back-end will function in Drupal 8. He starts out by talking about what web services are and how they work, then he talks about how Drupal 8 will incorporate REST and Symfony2 into core. He also gives an idea of how this will (or will not) affect Drupal module developers and site builders.