I thought this might be of interest:
It is currently on Steam Greenlight and could use some upvotes (link at the bottom).
Wallpaper Engine allows you to have stunning animated 3D scenes as wallpapers on your Windows PC. You will be able to create your own or download them from Steam Workshop. Everyone can create wallpapers, you don’t have to be a 3D modeler or game developer, but having these extra skills will allow you to make your wallpapers more unique and amazing!
Create wallpapers by importing images and models.
Export your Unity or UE4 projects as WebGL and use them as a wallpaper.
Share your creations on Steam Workshop. Either for free or at a price of your choice.
Save power and performance by pausing or unloading your wallpaper when, for example, another application becomes full screen or is maximized.
Select different wallpapers for each monitor or lay out a single one across them.
Portable app, no installation required.
Will also run without Steam and not show that you are ‘in-game’ on Steam friends.
So if you like what you see, please drop by and show your support by up voting