CDPR promised that The Witcher 4 will look the same on release as it does in the trailer.
The developers promised that the picture inside the game will be the same or close to the one shown to us in the debut video. The team will be able to implement a similar level of graphics, thanks to the technologies and capabilities of the Unreal Engine 5 engine. Note that all previous titles of the studio were created on an in-house engine, which now looks quite outdated.
As for the release of The Witcher 4, the team has nothing to please its fans about this.