Don't look now, but Lenovo is about to overtake HP to become the No. 1 PC maker in the world. The sleek and long-lasting ThinkPad X1 Carbon is not only the best Ultrabook yet, it's my favorite MacBook Air alternative. Meanwhile, Lenovo has arguably the best one-two punch in the PC-plus era with the upcoming ThinkPad Tablet 2 and IdeaPad Yoga. Lenovo's biggest not-so-secret weapon? It's home-field advantage in China. The company reached a record market share there of 35 percent last quarter.