Microsoft has posted a long Windows 10 Fluent Design demo video for complementing one of its Build 2017 sessions. This demo is not only useful for developers but has very detailed demo of UI changes that one can expect to see in Start Screen and native apps soon.These changes may drop by with further Fall Creators update preview builds and app updates for Insiders.
Many native Windows 10 apps already have got some of these Fluent Design elements. But this demo has more changes for those apps and even demos Fluent design on other apps like Microsoft Edge, OneNote and others. There is a demo of upcoming changes in Start Screen too.
Check the official video below,
 aka version 1709 Windows 10 Start & Apps UI changes){kind=link}