Analyst Gene Munster of Piper Jaffray believes a cavalcade of current iPhone 3GS users, who skipped the iPhone 4 for a variety of reasons, will move to the iPhone 4S by the millions over the next year, accounting for up to 18 percent of Apple's iPhone sales, AppleInsider reports. Munster believes that 18.8 million 3GS users, based on an estimated 27.6M total iPhone 3GS sales, are still available for upgrading and will likely take advantage of the new model.
