While AT&T is seeing success with Windows Phone sales, Microsoft isn't doing to bad with Windows 8. During the 11th Annual J.P. Morgan Tech Forums at CES 2013, Microsoft announced that they have sold 60 million Windows 8 licenses to date.
According to Windows Chief Marketing Officer and Chief Financial Officer Tami Reller this includes both upgrades and sales to OEMs for new devices. The sales pace is similar to what Microsoft experienced with Windows 7.
As far as Windows 8 apps and games are concerned, growth continues to rise with the number of apps being available quadrupling since launch. As an added bonus, Microsoft recently passed the 100 million app download mark.
Source: Windows Blog