From Microsoft's announcement page:
Today, we’re excited to announce new experiences for Windows 11 are starting to become available, including an Amazon Appstore preview available in the U.S.
What makes Windows, well, Windows, is the variety of apps available to let you do just that. Since the launch of Windows 11, the Microsoft Store has attracted more creators and users around the world; today we are adding over 1,000 more apps and games in partnership with the Amazon Appstore. Windows 11 users in the U.S. can access the Amazon Appstore Preview in the Microsoft Store, and popular apps like Audible, Kindle, Subway Surfers, Lords Mobile, Khan Academy Kids and many more. This experience, built on the Android platform and supported by Intel Bridge Technology, introduces a new category of mobile apps and games available for Windows.
To get started with the preview, open and update the Microsoft Store (click Get updates in Microsoft Store > Library) – search your favorite titles or explore our new curated collection of mobile apps and games; when you’ve found what you’re looking for, download them through the Amazon Appstore. These apps feel like a part of Windows, integrating naturally with Windows input and windowing experiences, like Snap layouts.Today’s preview reinforces our commitment to be the most open platform for creators, and we look forward to sharing more details later this year on how we’ll broaden availability with the Amazon Appstore. We can’t wait to hear your feedback on the experience.
There's a brief promo video to go with all this:
There are also extra features to Windows 11, namely Taskbar improvements and two redesigned apps: Media Player and Notepad. Read on in the source link for more detail.
PS. I'll be covering Your Phone again soon, looking at the recent updates and integration with the likes of the Surface Duo 2. Just as soon as the Features section of this web site works fully again!