Since Android 15 is ready and should be released for more devices soon, the Pixel Tablet 2 may come with either Android 15 or Android 16. Android 16 is expected to be released in 2025.
When not docked, the Pixel Tablet could then be used as a traditional Androidtablet with Google’s best features, as well as 3 years of major Android updates and 5 years of security updates.