There don't appear to be big changes from the original experiment. Taskbar icons are still spaced out and the search box on the taskbar is collapsed into an icon. The touch keyboard automatically appears when users tap a text field, while File explorer elements have more padding to support touch.
Microsoft is rolling out the feature slowly, once again starting with a portion of testers who have never detached their keyboard before or those who have set tablet mode to 'Don't ask me and don't switch'.
LeBlanc notes that the tablet posture experiment is different to the Tablet Mode that's currently available.
Microsoft wants testers to give feedback about what it's like to use the 2-in-1 as a touch device without going into Tablet Mode.
This build also includes Microsoft's attempts to reduce the load created by the Windows Search indexer. When it is indexing files, it will avoid heavily indexing while a machine is in use.
LeBlanc said another optimization will "significantly limit the amount of times the service indexes your files for content that doesn't have an impact on search experiences, and gives you a better experience on Windows".