Should you have been unable to attend JavaOne 2013, content from 60 JavaOne 2013 sessions is now available for your viewing, with much more to come. It's a very different world compared with even five years ago, when if you didn't attend a conference, and you wanted to gain insight to what happened there, your only options were to read blog posts from people who attended, or (possibly) download slides uploaded somewhere by individual speakers. Those options pale in comparison to today, where you can actually view a slide set and listen to audio synchronized with each slide.
I attended JavaOne 2013, and during the conference I focused on attending as many sessions as possible. I blogged about some of what were for me stand-out sessions even as the conference proceeded, late at night in our hotel room after very long conference days:
Some great sessions I wish I could have attended that are now available include (I can't find a way to provide a direct link due to the way the web site is designed, but if you go to the main site you'll be able to find these):
Lambda: A Peek Under the Hood
Home Automation for Geeks
Advanced JVM Tuning
Internet of Things with Java
But there's so so much more! Importantly, no matter where you live, no matter if you are among the 99.95% of Java developers who had no opportunity to attend JavaOne 2013: you can still access the vast majority of the information and knowledge that was imparted at JavaOne 2013. That's a great thing!
The natural progression of technology is that the spread of information to ever wider audiences at reduced latency is increasingly facilitated over time. If you're old enough, think the dial-up internet of decades ago versus today's broadband internet. If you're a student of history, think about the invention of the printing press and Gutenberg's movable type. With respect to technology conferences, an enormous change has occurred in recent years, led by innovation pioneered by Parleys.com.
For the Java technology historians among us, the fact that it's 2013 today doesn't mean presentations from earlier JavaOnes have no value. If you're interested, you'll find great content from JavaOnes 2010-2012 at Parleys.