Slot machines with a movie theme made by U.S. game manufacturer Bally Technologies is seen at Gaming Expo Asia in Macau May 22, 2012. Gaming executives and industry players gathering for the convention in Macau on Tuesday may have to finally confront what they have been predicting for the past two years -- a sharp slowing of growth in the world's hottest gambling market. REUTERS/Bobby Yip (CHINA - Tags: BUSINESS SOCIETY)