While PC Gaming may be the biggest player on the market, mobile games have received a lot of attention lately as well. Microsoft has even noticed and is just announced that they are bringing Age of Empires: World Domination exclusively to mobile (for now). The good news is that it is slated to launch on Apple, Android and Windows Phone devices. Quite likely it will launch on Android first, Apple second and then a month or so later - on Windows Phone. That's my guess according to their track record.
Source: Age Of Empires: World Domination