Kingdom Come: Deliverance is a medieval open-world RPG that aims to be as realistic and faithful to the era as possible. In order to achieve this rather lofty goal you obviously need colorful and realistic environments, and if the most recent trailer is any indication the developers are definitely on the right path!
The video itself is not very long, and it mostly serves as a teaser for things to come, but it does offer a pretty damn good idea of what sort of style the developers are going for. To be perfectly honest the visuals appear heavily inspired by The Witcher 3, and I don't mean that in a negative way given that its one of the rare few AAA games that is both gorgeous and colorful at the same time. But enough rambling from me, here's the video:
The visual showcase aside, this video is one of those silly "announcement for an announcement" affairs. What exactly the developers are trying to tease with this, nobody knows, but we won't have to wait for very long in order to find out as they have a "global announcement" planned for Friday, June 9th. If I had to guess, however, I would say the announcement is most likely going to be a cinematic trailer along the release date reveal. So if that's something you're interested in make sure to keep an eye on the official Youtube channel over the next few days.