So you cannot imagine a world, say 5-10 years from now, where 100% of games work on Linux, where PC game enthusiasts choose a cheaper and equally capable OS?
You can get a key for 5-10$ and the Windows 10 crack KMSpico is one of the most downloaded torrents. Cheaper doesn't work as a value proposition, it has to be better than Windows for people to change in large numbers and get used to a new OS.
On the other hand, knowing gamers, I'm pretty sure many would change if games on Linux were 2% faster... (higher fps)