From a quick look, I agree there is overlap around the canvas editor idea. Cate is aiming a bit more at the broader project workspace layer: terminals, browser previews, editors, notes, agents, git/worktrees, docking/tabs/splits, and persistent layouts around a project.
But yes, fair callout. Appreciate the input.
Re-reading my comment made me realize it sounded condescending, where it was actually meant to emphasize that a canvas editor is a great idea! So I am very glad that there is development is this space.
Just felt the need to clarify this...