The last two talks were about testing.
“Automating user interface tests with behavior-driven development (BDD)” by Jose Badeau and Dietmar Stoll used an Xtext-based DSL to connect requirements, wireframes and test descriptions so they can validate each other. In the example, they removed a field from the wireframe mockup and the Eclipse editor for the test cases showed errors where they were used in the DSL.
The demo showed once again how much power lies in connecting information from different sources. If you remember, then this was the key feature which set Eclipse apart from all the other Java tools in 2001: It could bring you to the place where something was defined by pressing F3 or Ctrl+Click. If you changed one file, it would instantly compile all the other files and show you any problems it would find. Having a tool which actively searches for problems saved and still saves a lot of time.