Gee while still not getting to one of the 10 Pro VMs(the one that saw the TH2 iso that is) I went for broke on the main build's primary and saw these results.
As you can see it was already downloaded and ready and lately on 7, 8, 8.1 systems 10 has been found already in the upgrade install process without any user interaction it seems! Besides that the comment I made earlier about this release being mostly about the Edge addons is what a blogger has been reporting as well.
The full report is seen at Windows 10 Build 14291 Is Out, Features Extensions Support In Edge
Once I clicked the Restart now button you look 58 minutes later at...
And then one more thing to add here as far as a slight change in appearance! since this is on the main build's primary drive.
Had to clean things up again in order to work on an upgrade from 7 to 10 video since the VM's watermark would intersect with the main's not having borders like any explorer windows see.