Netbooks can hardly do any gaming. Maybe flash or heavy 2D at most but nothing even remotely decent. Pisses me off all the time when I'm sitting at school, a bunch of kids have these really cheap netbooks, not even $500 ASUS ones which are semi-decent, and they're all whining about how they can't play Minecraft 1.8 because of their third world netbook.
Netbooks are purely for on-the-go things and long-ass battery lives, and just web browsing/notetaking, etc. They're useful for school unless you're one of those people that have to play games at school.