"emulated like we do in Wine"
The meaning of Wine is "Wine Is Not Emulator". Saying that because you emulate it is slower is talking *, sir.
Of course the Linux gamesphere is far from nice, but at least I can play Counter strike :V
Move to Linux then world would follow you...
By the way, installing W7 into another HDD is far better than play around Grub then * your actual config.
You can do that even on laptops (like me) cuz you can buy a sata bay for your DVD drive ( I did use once a year to burn the OS iso)
Don't know why everybody calls it dual boot when you can't load them at time.
The only difference between dual bot and install into another HDD is "where did u save the grub/mbr entry" and to use the main MBR/GRUB or use Bios boot override key at boot.
Im my personal experience, even hating Windows, I did take more advantage using Windows 8 as main SO and Linux as second, cuz I can fully load the Linux inside a VM from a real disk... so I don't rehuse to work with my 2nd linux even while playing from Windows box. That's a real DUAL OS for me...
If there's a way to share real disk into a Windows VM machine i would prefer to not use Windows as host machine, cuz is prone to viruses that could affect the rest of system. But for install few games is PERFECT.