I've read the whole previous thread and this one. Indeed there are differences. We can't be sure why though. It could be different settings for presenting smooth gameplay, different hardware, still unpolished parts of the game and many other things. There is always a difference between promo shots and actual gameplay. Having said that, I have faith that all will be fine. I can't imagine why a company like CDPR would take back words. Would it be nice if a red came to clear that up? Sure it would. Does the game still look pretty? Sure it does.
Do I personally care about that? No, not at all. I do not want to go off topic here, but I just came back from a thread asking for support and options for people with visual deficiencies ( you can read it here :
http://forums.cdprojektred.com/threads/31433-Request-for-Witcher-Dev-Team ). Said options have already been implemented in the game. They have done more than enough to give us a great gaming experience. We asked for more, they gave us more. Although they were not obliged to, they postponed release by a year to polish the game and fix whatever needed fixing, instead of releasing an incomplete game full of errors and patch it up later. They try their best, don't be too harsh on them, have a little faith and don't judge until gameplay tagged NOT Work In Progress can be watched.
The least we can do is wait until someone INSIDE the project talks to us. Instead of comparing games and companies, being oooh so sure of lies, downgrading, fire and doom, alien invasions, volcanic eruptions, Wild Hunt sights, Elder God appearances etc etc.