"All DLC for the PC version is and will remain FREE," development director Adam Badowski told Rock Paper Shotgun. "That's not likely to be the story for the Xbox version, because of certain Microsoft policies that need to be followed. But on PC, once you buy our game, you don't need to worry about any additional costs – we will provide all updates, including those featuring new content, for free." Badowski says no current expansion packs are planned, but if CD Projekt is to ask PC players for additional money, it'd be for "a more classic expansion pack along the lines of, say, Baldur's Gate: Tales of the Sword Coast."
The "certain policies" Adam is speaking about have certainly thrown developers for a loop in the past. Who can forget Team Fortress 2 and the Left 4 Dead 2 DLC thing? Valve's Gabe Newell has been one of the most vocal opponents of Microsoft's restrictive policies.