The themes worked just as they did in 8.2+ so any running app would be skinned like that. Here's the same Hi-Tech theme in 8.6 with SimpleText open.
In my D11E4 pics I enabled the Gizmo theme for some of the later shots.
As for the CW build, it may have just been a regular build running on a more stable internal build of Copland. Or it could be a mockup (as that pic is taken from the Mac OS 8 Revealed CD). It's hard to know just how usable Copland actually was as we only have two unstable builds.
In my D11E4 pics I enabled the Gizmo theme for some of the later shots.
As for the CW build, it may have just been a regular build running on a more stable internal build of Copland. Or it could be a mockup (as that pic is taken from the Mac OS 8 Revealed CD). It's hard to know just how usable Copland actually was as we only have two unstable builds.