Navagon: It's just another FPS. I've been playing them since the release of Doom and still am today, but there's no way this or any FPS is worth this much attention. Never mind the asking price.
Maybe Counter Strike 2. :p
MW is so popular because it was good on a console. You know, give those guys an auto-aim and pretty much an auto-shot, auto-match-making tool because they pretty much know crap when it comes to sorting a list of servers (I'm taking about the average mom and dad that play this game) and they'll worship you for the rest of their life.
No offense to anyone owning a console, but seriously, a FPS can't be better on a console than on a PC (unless the developers really wanted it to be that way). Too bad we're getting pushed aside, more and more developers prefer the consoles (more money no doubt).
Lets see them now organizing pro gaming tournaments in MW2. Just imagine the teams. :)