JavaOne intro: the internet of things
I don't know that I heard anyone say it out loud, but the JavaOne intro was a good effort to make concrete the abstract notion of an Internet of Things (something Scott McNealy (and others) started talking about years ago). The combination of small devices (e.g. sensors) and software to (paraphrase) "make visible things that are currently invisible" in pursuit of economics and environment. Measurement of traffic patterns (people or vehicles), measurement of environmental factors (carbon dioxide, pollutants in water, seismic activity), and on and on. I strongly believe that this will be the next wave of network expansion and I'm really hopeful for the life improvements these advancements will enable.
