If you’re on the beta, under Taskbar settings > Taskbar behaviors, you can now select options under Show smaller taskbar ...

Microsoft is testing a new taskbar icon scaling feature that automatically scales down Windows taskbar icons to show more ...

The Windows 10 version doesn't have modern visual effects like Mica, which makes it a bit less visually appealing.

Windows Insiders on the Dev and Beta Channel can now choose to have the taskbar always show smaller icons or make them ...