Found this on IW's website.Very nice read and shows you there are a few game makers that still care about pc gamers.



Source: PC Gamer (UK) December 2009 issue.

Modern Warfare 2 throws out traditional multiplayer methods - a big mistake

Modern Warfare 2 developers Infinity Ward set the internet on fire last month by revealing their enormous FPS wouldn't support dedicated servers - PCs that use all their juice and bandwidth to host multiplayer games.
Instead, they'll be using IWNET: a service that means that multiplayer games are hosted by players' PCs and internet connections. It might sound mild, but it's a Very Big Deal.

"It absolutely makes sense to have dedicated hardware crunching the maths, located in places with uber bandwidth and low-latency connections to as many ISPs as possible," says Craig Ferguson of Multiplay, who provide servers for Call of Duty 4, among others.
"Most home connections aren't up to the task. Infinity Ward totally underestimate the importance of dedicated servers. In many thousands of players' eyes, this game is now dead as a multiplayer title."

While he acknowledges that different games have different needs, DICE producer Gordon van Dyke is similarly vociferous: "For Battlefield, dedicated servers are absolutely essential... The server performs massive amounts of calculations to support the huge environments and quantities of destruction. We couldn't do that without dedicated servers."

Brink developers Splash Damage feel the same: "Dedicated servers empower players to create the game experience they want, which in turn fosters community," says Community Relations Manager Steve Hessel. "Our games have always drawn on the passion of mod teams, map-makers and the competitive scene; dedicated servers allow such communities to thrive."
That's the most important thing. Mods would barely exist without dedicated serves. With a dedicated or host-customisable server, you can run anything. And without mods, we wouldn't have Counter-Strike, Team Fortress, Defence of the Ancients...

"Splash Damage started as a mod team working on Q3F, a multiplayer mod for Quake III," says Hessel. "Without dedicated servers, probably nowhere near as many people would have got to play Q3F, and Splash Damage might never have turned pro."
Dedicated servers are a part of what makes the PC great, and cannot be lost because the biggest game of the year wants total control. Infinity Ward declined to comment.

Well this just proves it.
We still matter!
where do they make these games? On PCs DOH! 

Believe that was the best post I found explaining why we need them.