Slowly but surely, Windows 8 is making its mark. The latest numbers from Net Applications show that Windows 8 is now being used on 5.1% of all desktop computers, making it the third-most used desktop OS in the world behind Windows 7 (44.4%) and Windows XP (37.2%). More importantly, Net Applications says that Windows 8 has at last surpassed Vista, which now has a market share of just 4.6%. Given that Microsoft plans to end support for Windows XP next year, we’ll likely see Windows 8 adoption skyrocket in 2014 when companies move to upgrade their machines to newer operating systems.