I took inspiration from tiling window managers, tmux, picture-in-picture, and Starcraft.
It's a canvas that lets you create virtual desktops that you can teleport the mouse or windows into, move stuff between, save window position, size, canvas position, zoom etc. as macro / savepoints you can rapidly swap between.
There are a bunch of features.
I have used it for longer than it took to me to build to really nail the feel of using it. I really like where it is, but everything can be improved, and would love feedback - especially for performance.