It seems like there is a pretty big assumption here, not supported in any significant way. I don't see much evidence that there aren't big ideas being made right now. Not all big ideas make waves right away, for one. And some big ideas might not be obvious to everyone paying attention. How do you define it even? Audience? This post did little in that regard.

Also, who says we don't have and discuss big ideas in social media? http://www.reddit.com/r/AskReddit/comments/jitk9/how_the_fuc...