It was definitely exciting to see Lumia 950 and Lumia 950 XL announced this morning, but some would argue that the Surface Pro 4 was actually the most important announcement at Microsoft’s big launch event. Well before we even heard about the two smartphones, the Surface line was serving as Microsoft’s flagship mobile device, and Microsoft certainly hasn’t forgotten that. The new Surface Pro 4 is ridiculously light and thin, and comes with enough power to put the MacBook Air to shame, all for a starting price of $899.99.