Valve: Steam’d Penguins

It is about making cross platform development even more attractive. If you use an engine that runs well on Win/Mac/Linux/IOS/Android/Xbox/PS3/Wii U you have a lot of places where your game can make money.
So this is about discouraging Windows-only development.

The humble bundles have shown that there are people willing to pay for games on Linux.

The recent Kickstarter funded games will run on Linux with very few exeptions. (LWN was dead quiet about the "revolution" of funding stuff on Kickstarter, although I think Lighttable, Git-annex and Double Fine Adventure should have been mentioned. I submitted the news, but nobody cared)
Popular stuff like Unity (the game engine) and Moai and others are also developments that clearly make more Linux games possible.

All these trends are very good for Linux gaming.