This is the new promotional image for the June 2021 “What’s next for Windows” event.
It’s a pretty nice wallpaper from Microsoft. You can download it here in resolution HD 1920×1080, or over at the Wallpaperhub from Michael Gillett in 4K and 8K and everything in between.
The image size is HD 1920 x 1080. Click Image / Right-click and use Save Image As