TF2 is a complete visual overhaul. Even if the gameplay is the same, there is something new at the table. It is nicer to look at, which is important. Plus I don't think most of us played TF in years anyway.
The thing with TF2 is that we'll play it a few months and then move on to something new and different.
People at these PC rooms have been playing Counter Strike for 8 years, and it is like an obsession. It is very irritating when there are so many awesome new multiplayer experiences out there, that they won't even try.
When it comes to RTS games, they are still playing StarCraft! While the gameplay still holds up, I wish they'd try Company of Heroes or SupCom.
BTW GPW, my STEAM ID is Pugnate. Add me, and we can possibly play sometime.