Bad news from Infinity Ward. They decided to kill their title for for PC by porting poor console community instead of dedicated servers.

Here is poor response explaining how IW net will work:

"Source: Modern Warfare 2 on PC

Call of Duty: Modern Warfare 2 is actually the biggest investment Infinity Ward has ever made into the PC version of our games. It’s also the most feature-rich PC version we’ve ever made. IWNET takes the benefits of dedicated servers and allows them to be utilized and accessed by every player, out of the box, while removing the barrier to entry for players unaware of how to maintain a server on their own.