Portable connectivity applications are driving the global Wi-Fi chipset market, with shipments growing on account of big growth from the mobile PC segment, the Portable Consumer Electronics segment, and the dual-mode handset segment, reports In-Stat. Although dual-mode cellular/Wi-Fi handsets represented only 3% of total shipments in 2006, this category will be the breakout market segment in 2007, and will reach 20% of the total chipset market in 2009, the high-tech market research firm says.