https://www.theguardian.com/games/2019/dec/13/microsoft-names-its-new-games-console-xbox-series-x

The machine previously known as Project Scarlett will be four times as powerful as Xbox One X with a range of next-gen features

Microsoft has revealed the name for its new games console – Xbox Series X. The machine, previously known by the codename Project Scarlett will launch in “Holiday 2020”, and will ship with a redesigned version of the Xbox wireless controller.