ActionTrip:

ActionTrip: What about the Source Engine? What are the upgrade plans?

Gabe Newell: Since we've shipped Half-Life 2, we've added HDR, multicore support, we've added some second generation potentials and stuff...

ActionTrip: Do you think you can transition to next-gen with Source?

Gabe Newell: You know, theoretically, there might be a time where it's a problem. I think that the scary thing for us was the ability to take advantage of the multicore systems that have been coming. I think right now it will work well. The thing is that if you have an engine and you pick one piece and then just maintain its adaptings and make everything else stable, it's much easier to ship that code, but if you try to do it with two pieces, or all of the engine at the same time, then it makes it exponentially (harder).