As for individual vendors, Lenovo stands out as the only PC manufacturer without a precipitous loss in growth — IDC says the company posted a 0.0 percent change year-over-year, maintaining its second place spot and closing the gap with HP. But all top five vendors performed unremarkably in the year since Q1 2012, with shipments from HP declining by 23.7 percent, Dell by 10.9 percent, Acer by 31.3 percent, and ASUS by 19.2 percent. IDC says even Apple took a hit in the first quarter of 2013, with a 7.5 percent decline in growth over 2012. "The industry is going through a critical crossroads," IDC writes. "Microsoft will have to make some very tough decisions moving forward if it wants to help reinvigorate the PC market."

We're definitely post-PC now, but it's really only one of those companies that's managed to build anything like a convincing alternative.