Thing is, no one on that forum has actually tried it.
I don't think there are many people that still use XP for new games (as opposed to using it for older games).
It might work. It might not. We don't know any better than you do, and Google isn't helping either.
If you want to play newer games, you should probably consider getting a computer with Windows 7 or later for the new games (with video card and other specs good enough for gaming), and keep your XP computer around for the old ones.