Both ultrabook, MacBook Air shipments to swell in 2013

Dell XPS 13 ultrabook. (Credit:Dell) Ultrabook andMacBook Air shipments numbers will grow by about 7 million units in 2013, according to market researcher Gartner. “We are looking at about 5 percent of total mobile notebook shipments in 2012. that includes Apple’s MacBook Air, which is a big portion of that five percent,” Mikako Kitagawa, an …