It began with developers stampeding to their seats and ended with the announcement of a new programming language. It was WWDC 2014, and Apple had a lot to talk about. Tim Cook and Craig Federighi took turns announcing new versions of iOS and OS X, with new features and designs on both sides. But they spent most of their time talking about how Apple devices talk to each other, how apps can work together, and how Apple is taking a new, friendlier, more inviting approach to the way it designs software. That may turn out to be much more important than a new Mac Mini ever could have been.