As someone who doesn't play online games this is not a trade off I gladly make. Fortunately, however, KLAC will never become part of the Linux kernel, because adding it to an open-source system simply doesn't make sense.
If it doesn't, Linux will always be a second-class platform for gaming. Valve is currently working on solutions beyond user-space, and I hope they succeed. I would like to move to Linux but I'm not willing to give up online games, and I hate playing with cheater.
As I've already said, I don't play online games, and I'm not particularly concerned about all the fuss surrounding anti-cheat measures, so I don't think that suddenly makes Linux a "second-class gaming platform." For the games I do play, it's a first-class platform.