Lenovo is growing quickly enough to be a challenger to Apple's long-held dominance in all-in-one computers, a mixture of unofficial sources and estimates claimed on Monday. The iMac represented 30 percent of AIO market share in all 2010, but Lenovo's 23 percent growth in desktop sales during the fall has been attributed to a "significant" bump from its IdeaCentre AIO models. The growth would be just the start, as Digitimes Research estimated that Lenovo's shipments would surge 54 percent just in 2011 to hit two million PCs based on sales in its native China.