Maybe concentrating on a task that requires hand-eye coordination and lots of thought for more than 2 hours at a time is not healthy.
Um, isn't that what most
I know I always feel queasy if I've been playing an action game for that amount of time.
Motion sickness when playing 3D games is common; I would hope that you wouldn't suggest that travel by car, ship, or boat is unhealthy because they cause motion sickness.
Machines certainly can solve problems, store information, correlate, and play games -- but not with pleasure. -- Leo Rosten