Oh, I can see it already...
North Korea decides it's business time and does march off south in search for a high speed internet connection for their glorious leader. The South Koreans are still busy Zerg rushing the rest of the internet in Starcraft and, following north korean troops real-life Zerg rushing Seoul's leading internet hub and disconnecting everyone to have as much bandwidth as possible for old Kim, a mass nervous breakdown occurs rendering the entire South Korean state unable to resist. Having licked blood, the NKPA presses on south to find more storage capacity for their glorious leader, who by now is busy filling up every single byte of hard drive space in North Korea with porn.
Around the globe, the rest of the internet breaks down because of a massive nerd drama epidemic. Heated arguments among pseudo war experts are producing text walls that are choking every single server mankind has ever built. The most significant arguments pop up in the Falcon 4 community whose mebers just can't seem to decide whether the situation on the real battlefield represents the first, second or third start scenario of F4's main camapign. The intense hammering of fingers on keyboards leads to a worldwide medium sized earthquake confusing the heck out of geologists. This also makes "The end of the world in 2012" believers join the fray who just can't decide if the Mayas were wrong in the end or just trolls officially announcing the end for a later than actual date.
Meanwhile, MacArthur, after having begun to spin in his grave and starting a long drill from the continental United States, emerges in Pusan in a zombiefied state and thus scares the crap out of the North Korean army, driving them back to the chinese border. Kim is still busy watching all that porn and never notices. The Chinese are not amused and chime into the war, sending MacArthur, slightly traumatized, running southward and swimming all the way back to his casket.
The South Koreans, now experiencing a fit of nerd rage because of the loss of their precious multiplayer stats, manages to hold both People's Armies back near the 38th parallel.
The Falcon 4 fans, in a seldom moment of unity, have decided to take the wheel themselves. With stolen south korean F-16s they want to prove that the two and a half year studying of the 800 page manual pays off and thus, huge swarms of Falcons fly northward. Since, however, being a perfect sim pilot does neither automatically grant you a Top Gun trophy nor makes you get a feel for the real deal, you've got a chaos that would send tears to every physicist's eyes. Needless to say, hilarity ensues over the front and while the chinese, north and south korean soldiers around have spiffy time watching the display, one nerd in his Falcon strays off course because he's flying a Block 15 version and is only used to the Block 40 avionics. His unfortunate journey ends for him on page 148 of Falcon 4's manual and for the jet right in Kim Jong Il's bedroom while the Great Leader himself was just really liking the achievements of the capitalist world in the porn branch.
The north koreans, not seeing a point in living in a communist state without their glorious boss, immediately surrender under the condition of a massive banquet sponsored by the south korean branch of McDonald's. The Chinese are finally glad to be rid of that whiny, demanding neighbour and go home, while the remaining Falcon 4 users land their planes and take two seconds for mourning their fallen comerades before logging on the first available PC and claming *they* won the war by their sheer mastery of the sim.
The korean people, finally united, celebrate with the second biggest party (in terms of alcohol consumed) after the german reunification. Since fireworks were scarce and forbidden for their cheery, capitalist, coloring in North Korea, the formerly oppressed farmers just take everything they can find and blow it up. Hence, the whole korean peninsular experiences the most intense fireworks ever all the while meteologists all over the world put mushroom clouds from the "very rare" category into the "common occurrence" one.
The rest of the world didn't notice anything due to the massive global internet outtage and when billions of frustrated people on the planet wake up the next day, they awake in a better and happier world.
The end.