..In a new video celebrating the milestone, shared on Instagram by Panos Panay, Chief Product Officer at Microsoft, the company has teased a few new UI changes coming to the start menu. The video starts off by going through the various versions of the OS from Windows 1.0 through Windows 10, after which the new app icons are seen replacing the older squared icons in the app list on the start menu.
https://www.neowin.net/news/microsoft-teases-new-windows-10-start-menu-in-its-success-video