From the official site:
Im pretty sure they said that PC version will be getting all the 360 changes/upgrades. Trying to find a quote.
EDIT: Here we go
CD Projekt RED will reveal all of the important facts regarding Xbox 360 version of The Witcher 2: Assassins of Kings during the upcoming conference held in Copernicus Science Centre on the 26th of January.
We will be unveiling many exciting details about the game such as its release date, brand, new trailer, additional features coming to the console adaptation and many more.
"Witcher 2 on Xbox 360 is not just a simple port of a PC game, it’s an adaptation. Our newest game has been enhanced with many new features, and according to many specialists it’s one of the best looking games on Xbox 360 ever" – said Michał Nowakowski, Member of the board, CD Projekt RED S.A..
Im pretty sure they said that PC version will be getting all the 360 changes/upgrades. Trying to find a quote.
EDIT: Here we go
http://www.eurogamer.net/articles/2011-09-26-new-witcher-2-on-xbox-360-details (spoilers)The Witcher 2 on Xbox 360 will get extra story content as well as the 2.0 enhancements, Dark Mode, Arena, new tutorial and new four minute opening cinematic, CD Projekt Red has revealed.
And, crucially, it will all be offered for free on PC, either "around the same time" or very shortly after. "If there's going to be some differences they're not going to be like months," story designer and writer Jan Bartkowicz told Eurogamer in an interview following his Witcher 2 Expo presentation. "They're going to be more into days. It's what I think is going to happen."