Android games are not Linux games at all. They only work inside Dalvik VM with Google's APIs. Linux is not even relevant to them. And, these mobile games are almost always little puzzlers, platformers, stuff like Angry Birds.
Windows is still the premier platform for fancy big-budget games and Android doesn't seem to be going there any time soon.
Interesting that the article claims that Apple dominates mobile gaming but then shows a graph that does not include any of the dedicated mobile gaming platforms such as the Nintendo DS.
Microsoft has been crushed in the mobile game space by Android/Linux.