Do you have a citation for that? Lots of people play video games on big screens for hours at a time and don’t get motion sickness.
Being on a big screen probably makes it much worse.
Also I’d conjecture video games are different. It’s like driving a car. Since you are directly controlling the camera usually, I think this helps your brain avoid nausea. Although there’s plenty of people who can’t play FPS either because it makes them feel sick.