It doesn't matter what computer, graphics card, or monitor -- If I watch someone playing a FPS for more than a couple of seconds (yes, 2 whole seconds) I start to get sick. A good couple of minutes can ruin me for hours. I can't play them either obviously.
I can't watch someone play Need For Speed Porsche for very long (but can for a while) before I start to get sick, but I can play it for a good hour or so.
One of my friends (wife half of a couple we are good friends with) is the same way. When my wife and I and the two of them go to the movies, any time there's a funny camera sway like that horrible "roller coaster" filmstrip opening, she and I have to look away. Neither one of us could watch the Blair Witch Project either.
--- saint