This just in..
The Remote Server Administration Tools (RSAT) that will run on and support remotely managing Windows Server (including the latest Windows Server 2016 Technical Preview) are now generally available for download.
You can find the download HERE
NOTE: Make sure you read the system requirements! These tools only run on Windows 10 Professional and Windows 10 Enterprise. So don’t go trying to do any fancy-schmancy server administrating from your Windows 10 Home installation.
UPDATE: Those of you who may have installed this and not seen the tools actually installed… Watch your language. This release is for English (United States) only. Yes, I wish it would give you a big error and message about "wrong language version" or somesuch, but apparently it just appears to succeed without so much as a beep.
Remote Server Administration Tools for Windows 10 is available only in English (United States) for this release. If you are running Windows 10 in a language that is not English (United States), be sure that you have installed the English (United States) language pack before you install Remote Server Administration Tools. To install the language pack, on the Start screen, click Settings. Click Time and language, click Region and language, and then click Add a language. Click English, and then select English (United States). When you are finished, close the Settings dialog box.