I actually think it can do alright, depending on the price. It seems to get how I think people play portable games, and by people I mean adults. It's the size of something that's luxurious to play at home and can fit in a bag. But it can't fit in a pocket, but really, I don't think I've met someone who puts a portable gaming system in their pocket. Your phone is in your pocket. This is something that isn't sacrificing quality for size, yet it is still portable enough for commuters n' shit.
I don't think there is any appeal for kids. But kids are potty heads and smell bad. And NGP is effectively population control. The cost of having a child is comparable to owning one, and choice between them is obvious.