The actual *.tif is available which is even higher quality

https://archive.org/download/theoriginalfilesofsomewindowswa... (47mb)

https://archive.org/details/theoriginalfilesofsomewindowswal...

Microsoft Design also released 4K renders of nostalgic wallpapers (including bliss) a few years ago. I can't find the original link but here's the reddit post with the pictures.

https://www.reddit.com/r/windows/comments/ogpni5/microsoft_n...

Thanks! Wikipedia links to Ars which links to this high res version https://msdesign.blob.core.windows.net/wallpapers/Microsoft_... which is a 404.

I never realized there is a bird present in front of a cloud, neat.

Can you spot the bird?