Maybe next year, I'll probably start using SteamOS straight away as the next year's New Year Resolutions just like using Windows 8 as part of last year's New Year Resolutions. It seems that Valve joins the Linux Foundation like they're trying to promote their SteamOS to ensure that the gaming on Linux gets popular with Linux version of Steam. Games that are on Steam are already playable on Mac OSX and Linux OSes and it may seem that Ubuntu is one of the most popular Linux distributions.
Every year, they will be paying between $5000 and $20000 after joining the Linux Foundation.