In an article for the Boston Herald this morning, Scott Van Voorhis writes that Macworld Expo’s planned return to Boston next year may not happen after all. According to the article, David Korse, the new head of IDG World Expo (organizers of the show), has “launched an in-depth study on the merits of New York vs. Boston.” In fact, IDG has already canceled a block of hotel rooms previously booked for the Expo period.