Warren Buffett won't be the main event at Berkshire Hathaway's annual meeting this year. Reuters For the first time, Warren Buffett won't be hosting Berkshire Hathaway's shareholder meeting. New CEO Greg Abel will take center stage this weekend and field hours of questions instead. Attendees predicted a more sober Q&A and a smaller gathering, but still expected a good time. Berkshire Hathaway is about to hold its iconic shareholder meeting — without Warren Buffett as host. Tens of thousands of people are expected to descend upon Buffett's hometown of Omaha this weekend for a gathering dubbed " Woodstock for Capitalists ." As usual, they can shop for Squishmallows plushies and Fruit of the Loom sweatshirts, picnic at Nebraska Furniture Mart, hunt for deals on jewelry at Borsheims, take part in the Brooks Running 5K, and watch a live Q&A with Berkshire's top brass. However, Buffett won't be sitting on stage, taking questions while munching See's Candies and drinking Coca-Cola .…