There are various ways in which one could measure the reach of a new OS in the market. Usage share is important one among them and Steam gaming service usage numbers will give us a glimpse of market trend. According to the December month stats from Steam, Windows 8/Windows 8.1 saw a growth to capture about 20% of the usage share among Steam gamers. Windows 7 remained the most popular OS with an usage share of 64.38%.
According to the the latest market share data from Net Applications, at the end of December 2013, Windows 8 and Windows 8.1 gained 0.85% points. It now holds 10.15%, up from 9.30% in November. Thanks to new PCs and the free update for Windows 8 PCs, Windows 8.1 market share increased by 0.86% from 2.64% to 3.50%.