Video games can alter the perception of reality. TFA is about the "Tetris Effect", which is nothing new per se.

Perhaps the new elements is that studies confirm its existence, and that it could be leveraged to prevent or mitigate PTSD.

On a side note, this works even with chess. At some point I played Chess a lot, and I noticed I started to interpreting people's movements, behavior, intentions even, as chess piece moves and tactics. Must be weird for actual chess GMs.