If you have a quick look in the Windows Tech preview section, Mike, There is already a few posts on this release. It was leaked a day before the on line meeting. I decided to wait and installed it, fresh, from the update. (Made my own ISO)
On the Laptop I use for this purpose, initially it gave me huge problems, as it seemed unable to find my network drivers. As a result I could not get much to work 100% on the desktop.
It seems to have settled down now and is working, at least as adequately as the previous version.
Nothing outstandingly new (for me).
My Windows folder is bigger again, back up to 38 gigabytes.
Half of that is the DriverStore folder which is now 18.2 gigabytes or about twice as big as is was.
It didn't do anything to help the DriverStore problem though.
I keep putting off doing a clean install because of all the stuff I'd have to install or setup again, I keep hoping that I can get to the release version before I do that, but I may have to do it before then.