To sum up the presentation, it was about closures, in Java. In particular, it went into explaining what are closures and how you might use them. The tough, and more interesting part, is how you would use them in a statically typed language like Java.
It will be interesting to find out what percentage of the Java community will actually grok how to utilize closures. The impression that I got from the presenter is that closures will be limited to the library and API writers in all but trivial cases.