Samsung I am regretfully having to return your Q90T due to the lack of Dolby Vision support. I bought the Q90T in hopes of getting a maximized experience with the Xbox Series X which utilizes the Dolby Vision format for HDR. Many others plan to follow suit or not buy your product at all. Listen Samsung that is a huge community of buyers who are forced to look else where for the features they need. LG has all the formats but OLED is to risky for gaming burn in due to static status bars and huds. LG build quality is also lacking. Samsung do not abandon your loyalist and reputation of premium quality. QLED is the right direction but we need support for the next generation consoles.
No Samsung QLED to date was ever specified nor will be made to support Dolby Vision. This is not an Xbox error, simply a manufacturer choice. If you want an LCD with Dolby Vision check the Sony X900.