Windows 10 will make Windows 8 out to be the enemy long before there will be any Linux games worth playing. The mass exodus will be by users switching from Windows 7 (or Windows XP) to Windows 10. There are a few reasons I don't run Linux as a primary OS - Hardware compatibility and Games/Apps. I hate Windows 8, but I use it every day to manage my finances, create documents, and play games. When Windows 10 comes out, I will upgrade as soon as I can get my hands on it. I already run it on my secondary laptop. I'm afraid the Linux desktop will never be a gaming platform. Now that Linux has .NET (not that it needed it, I'm just saying that many .NET developers will switch to using it), it will rise to complete dominance as a server platform (where it is already a great threat to Windows).