Here's the answer to your question.
Which means you have both Linux, which is free, reliable, and stable, and then you have Windows, the monopoly, and gaming OS, because it's a monopoly.
I personally don't enjoy Windows as much as Linux because Windows is targeted for all the trojans, all the spyware, all the adware. Linux is a free OS and has many many different ditrobutions, which makes it harder for a person to target a specific Linux OS because you can constantly update your Kernel. The Kernel is essentially your core file. The thing that makes it do what it does. Or atleast that was what I was told.
But if you want to be able to play all the latest games, yet have a very stable and reliable computer. Then a Dual Boot is for you. Just install Linux on one HDD, or partition, and Windows on the other HDD or other partition. It's easy.
If you are going to get Linux though, get Fedora Core 4, or UnBuntu. Both are very user friendly and both are very reliable. I use Fedora Core 4 (FC4), and it's the best OS I've ever used. It has a lot of cool features Windows doesn't have. Sure most games are targeted towards Windows but there are emulators out there that allow you to play your games, such would be Wine or Cedega.