Porchetta: It's what's for dinner.
Courtesy of 4505meats.com
Who knows exactly why things suddenly become popular. You could blame it on the media (although, as of now, there's a one less media outlet to blame), or you could blame it on the power of suggestion—a chef sees something on a menu someplace, it lodges in his or her consciousness, and before you know it they've put it on the menu at their restaurant without even realizing. Think of it like seeds scattered in the wind, trends moving from coast to coast.