PC sales won't significantly bounce back in 2012, Gartner estimated on Thursday. Analysts saw shipments growing just 4.4 percent this year over last, to 368 million units, as PC builders played "catch-up" to tablets and other mobile hardware in interesting features. Research lead Ranjit Atwal didn't share the optimism of Intel or Microsoft and saw neither MacBook Air-inspired ultrabooks nor Windows 8 as automatic foils to the iPad and the collective Android tablet space.