Careful observers have noted that graphics on the new release of Witcher 3, coming out next week, are lower in quality than what was initially revealed. Game reviewers and streamers were given an early access to the game so they could get that hype train rolling, but PC reviewers didn't get any.
The official word from the Witcher 3 collective publisher team is that a PC version isn't ready yet, so it's no surprise that we haven't seen a full pc review yet. What people are noticing though is the current console version has been downgraded from what was seen earlier.
Publishers promise it will be optimized for whatever platform it is on, but this looks to be another case of releasing a game at the lowest common console denominator. Check out the video where these two hosts have a go at the discussion of downgrading graphics to the console lows.