A few details about Project Scarlett were revealed at the Xbox E3 2019 briefing, but it seems in the end it was the next episode in a very famous game franchise that did most of the talking for the next-generation console. A teaser video offered some familiar glimpses at what is expected from future Xbox consoles, but it was the game engine footage of Halo Infinite that stole the show.
https://www.notebookcheck.net/Project-Scarlett-with-its-new-generation-SSD-and-Halo-Infinite-take-center-stage-at-the-Xbox-E3-briefing.423669.0.html