Sure it's easy for two people to be online at the same time. Think of an internet cafe and everyone on there own laptops and just replace it with game consoles. The same way your next door neighbor can play a PS3 and you have the Xbox 360. You both must have your own consoles and monitors. That they are hooked up to the internet in the same room, house, city, or country makes no difference, except maybe in access to the internet. Think of an electronic show where they are demonstrating the different game consoles and games and imagine how many different machines could be hooked up at a convention for gamers to test new games.