Windows 10, version 1709 now available - Microsoft Tech Community
As usual, this is a big update that replaces most of system files, similar as on mobile devices.
"Windows as a subscription" is now reality, and the changes are both frequent and large in size.
What's new in Windows 10, version 1709 | Microsoft Docs
"a list of some of the new and updated content that discusses IT Pro features in Windows 10, version 1709, also known as the Fall Creators Update. Windows 10, version 1709 also contains all features and fixes included in previous cumulative updates to Windows 10, version 1703."
Need to be confused a bit more?
Actual version number of Windows 10.1709 is "10.0.16299.15"
and base "build number" is 16299.15.
Same version of Windows is available for Windows Server :
When developing UWP (Universal Windows Platform) apps for Windows 10
the developer can select minimum level of features / version supported.
https://developer.microsoft.com/en-us/windows/downloads/sdk-archive
https://developer.microsoft.com/en-us/windows/downloads
Windows-Developer-Day-Fall-Creators-Update/Keynote-with-Kevin-Gallo
Windows Developer Day—Fall Creators Update sweepstakes - Windows app development
"Publish or update your app for the Windows 10—Fall Creators Update by November 17, 2017 for a chance to win over $8,000 in prizes."Windows Developer Day—Fall Creators Update sweepstakes - Windows app development
https://developer.microsoft.com/en-us/windows/projects/campaigns/dream-build-play-challenge
$200,000 USD in prizes and four categories for entries.
"The Dream.Build.Play 2017 Challenge is pushing game makers to maximize their creativity and create experiences that engage gamers from across the world. This competition is open to all creators, working solo or in teams of up to seven. Create a Universal Windows Platform (UWP) game for one of the categories below by December 31, 2017, and you’ll have a chance to win cash prizes and share your game with the world."