Cortana will no longer be included in the first boot experience or pinned to the Taskbar
Desktop wallpaper cannot be roamed to or from device when signed in with a Microsoft account
Microsoft Edge with IE Mode replaces Internet Explorer 11 desktop app
Snipping Tool and Snip and Sketch have been merged into a single experience keeping the familiar Snipping Tool Name
Taskbar pins and ordering can be controlled by organizations
Organizations can override Start layout (but without the ability to lock down the layout from user modification)
General Start changes: Named groups and folders of apps are no longer suppported, Layout not currently resizeable; Pinned apps and sites will not migrate when upgrading from Windows 10; Live Tiles are no longer available (replaced by Widgets?)
Math Input Panel is removed - Math Recognizer will install on demand instead.
MUlti-App Kiosk MOde is not available (only single app is supported in Kiosk Mode)
Tabled mode is mremoved
Timeline is removed (similar functionality in Edge)
News & Interest has evolved
Quick Status from the Lock screen and associated settings are removed
S Mode is only available now for Windows 11 Home edition
Search results from the internet: Windows 11 does not support disabling the return of internet search results via registry key.