Xiaomi on Wednesday unveiled the Mi Notebook Air, its challenger to the MacBook Air. The 13.3-inch model is priced at about $750, compared to the MacBook Air's $1,050 price tag in China. The device is also available in a 12.5-inch version. The Mi Notebook Air offers a number of features that aren't available in a MacBook Air. "This is Xiaomi's way of saying, 'Let's not let Apple, Lenovo, or the bigger manufacturers from Taiwan, like Acer and Asus, take this opportunity from us," said Jeff Orr, a senior practice director at ABI Research.