Brands may be pouring money back into online display advertising, but that doesn't mean that display advertising works or won't be replaced by something else in the next few years. Will it be social, mobile, or something else? At TechCrunch Disrupt NYC , we'll get into this debate with three of the best operators in online advertising: Facebook's new VP of Global Advertising Carolyn Everson , Medialets CEO Eric Litman , and Right Media founder Mike Walrath . Media companies and brands still don't understand the power of social advertising, and Everson is going to explain it to them.