The upcoming Stellaris: Utopia will be the first major expansion for Paradox's space-faring 4X strategy game. It will bring with it megastructures such as the Dyson Sphere or Ringworld, Habitat Stations that help you house more population even in smaller empires, Traditions that allow you to expand and improve your empire via special perks, and the list goes on for quite a while.
If you're interested in a short but still detailed overview of all these features and their effects on the gameplay you'll find the recently posted "Feature Breakdown" video down below. There is also a brief mention of the free update coming alongside the Utopia expansion, so if that's something that tickles your fancy make sure to stay to the very end of the video. Have a look:
Stellaris: Utopia and its accompanying free update will be available on April 6th, with the expansion itself being priced at a fairly significant €20. If you would like to grab yourself a piece of Utopia, or just learn a little bit more about it, you can find what you seek on the official website.
As a final note, if you're less interested in the gameplay features and more about the actual themes and ideas behind Utopia, you will find the "Path to Ascension" trailer right below. It features absolutely no gameplay, but it does a damn good job of making Utopia sound awesome. Enjoy!