Microsoft has announced that the Xbox Series S in Carbon Black with 1 TB SSD is now available for pre-purchase at microsoftstore.com for $349.99 ahead of its worldwide release on September 1, 2023. This console is largely identical to the current Xbox Series S, aside from the color scheme and additional storage capacity. The Xbox Series X is already available in black.
From an Xbox Wire post:
Meet the new Carbon Black Series S with 1TB of storage. Whether you’re looking to upgrade from your current console or are new to Xbox, the Xbox Series S – 1TB offers you another option within the Xbox family of devices. The bold Carbon Black color is the same sleek, modern matte finish as Xbox Series X and the Xbox Wireless Controller. This console features the same next-gen speed and performance of our 512GB Series S, now with double the storage so you can download even more of your favorite games to your console where they’ll be ready to play when you are. Plus, you’ll make the most of every gaming minute with features like Quick Resume, lightning-fast load times, and gameplay of up to 120 FPS – all powered by Xbox Velocity Architecture. 
Xbox Series S pairs seamlessly with all our fan-favorite Xbox accessories. You can also add an Xbox Game Pass Ultimate subscription (membership sold separately) so you can play new games built natively for Xbox Series S and X like Starfield and Forza Motorsport on day one. Plus with games added all the time, there’s always something new to play.