Man, wish we had dynamic wallpapers like this, and we could have had it decades ago.
Why do companies like Apple & Microsoft sterilize themselves so?
This was already a thing almost 3 decades ago. Active Desktop [0] was just a web page displayed instead of the wallpaper image.
I was having a very similar thought - finally a nice use case for HTML wallpapers like Windows used to have them. I bet that there's a trick to have this as a desktop background in Wayland, but I'm too lazy to find out right now.
Either way, really nicely made, I love it! Small change request: adjust the CSS to make the controls look less vibecode-y.
While it's not free or a first party offering, I've had great success with Cindori Backdrop:
Just tested and this works great on macOS with Plash [1] by Sindre Sorhus. I couldn't find too many URL parameters to control it, but the FAQ does mention an ?obs parameter to hide the interface by default and ?weather=... to choose the weather. This URL in Plash works as described:
I was also able to omit ?obs and use the website interface controls to configure it via Plash browsing mode and then the interface went away after a moment of inactivity.[1]: https://sindresorhus.com/plash