These photos (snapped on the train to the Tokyo Game Show on Saturday morning) demonstrate the rare skill known as "parenting." (Judging from the antiquated hardware, this also demonstrates another rare life skill known as "frugality.")
In six years of riding the New York City subway to work (and around town), I never saw a scene like this. Add these shots to the stack of evidence that demonstrates that gaming in Japan is both a family and a public affair, free from the stigma that plague the hobby in the United States.
Then again, we never did get a good look at the screen. They could have been paging through super ecchi manga on the thing, for all we know.