TED is happening right now. If you're not familiar with TED, you should change that. It started, to my understanding, as a Technology, Education, and Design conference, but has evolved into a gathering of the worlds greatest minds and innovators from every walk of life and every discipline.
I once had the goal of being invited to TED (it was in invite only occasion) but now anyone can go, it'll just cost you several thousand dollars.
They post videos online of their talks. Amazing stuff, pick a topic, you won't be disappointed.