What are good topics for panel discussions?
My answer to What are good topics for panel discussions? on Quora
Anything that’s controversial in your industry, especially if it’s a recent debate. Just make sure that your panelists disagree—there’s nothing more boring than a panel where everyone has exactly the same opinion.
As an example: the topic of building HTML5 mobile web apps as opposed to creating native iOS and Android apps is a perennial point of contention in the web development world. A panel with people who passionately represent both sides of that debate would be a good bet for a web conference.