So here’s what I found so far:
https://connect.microsoft.com/ConfigurationManagervnext/Downloads
Note: You need to join the “program” to access the downloads page.
1. The obvious! Windows 10 Technical Preview deployment support.
2. MDT auto-spans >4gb WIM files to support UEFI bootable “removeable media”. Thank you Microsoft!
3. New “unfancy” wallpaper.
4. Same unstable MMC console.
5. Editing the Unattend.xml still “works wonderfully”.
6. And lastly, but MOST important! Once you UPGRADE your DS, there is NO going back!
/Brian G