For me it was a major revelation when it was pointed out that, for someone who doesn't want his desktop changed, I did install all sorts of crazy things when I was starting with Linux (Compiz plugins, anyone?). And while Gnome 3 pushed me into Mate, it wasn't because it was different but rather because it was bad. So I'm excited about someone trying something new, particularly someone who realizes that the Desktop is not a tablet.
Here's an idea that I believe I read in HN as "the original purpose of the desktop": add a Desktop Manager that manages which icons are on your desktop and makes it easy to switch.
The desktop is kind of weird, in the sense that it's prime real estate but, at the same time, there's an expectation that you shouldn't put too much stuff there, and then it ends up cluttered anyway. I think it's worth trying a stronger separation between "Desktop" and any other regular folder, emphasizing that the Desktop is where you place links to the files you need right now, but with a mechanism to clear it completely (without losing data) and another to switch which icons you see right now, kind of like browser tab groups. That way, when you're working on a project you place the files you need on the desktop and when you're done you clean it up.
I agree, GNOME 3 and all the subsequent versions are so bad. They made GNOME into a glorified tablet environment, but I'm using a desktop, not a tablet, for a reason.
I'm still mad at GNOME developers for ruining such a good desktop environment.
Luckily, Linux Mint managed to create a good environment that is as pleasant as using GNOME 2.
On old Macs you could drag files and folders on the desktop, work from there, and then put them back where they belonged with a single command, one by one or all at once. Applications used file IDs to refer to them, so all references kept working (not only with the desktop, but with all moves and renames). But old Macs had a different filesystem; modern filesystems are probably not fit for that.
The Amiga Workbench was semi-spatial in that you could snapshot icons in place so their locations would persist, but you could also drag and drop icons everywhere without saving their location and it'd reset next time.
My current desktop works like that. It's not quite what you're describing, but it's a couple of minor iterations away to allow multiple different snapshots.
> The desktop is kind of weird, in the sense that it's prime real estate but, at the same time, there's an expectation that you shouldn't put too much stuff there,
If we go further into the metaphor of a desktop, there would be sections for tools and sections for pending work. The inkwell versus the blotter, if you will.
But then, well, what difference is there between a designated permanent zone of the desktop for non-tools, versus a regular window showing some contents of a folder, which the user has chosen to position above an empty area?
The Desktop isn't prime real estate when you are actually using your computer and have windows covering it. Then it becomes cumbersome to access anything on it, even with a one click show desktop button.
Having the desktop not also be a file dump by default and instead a space for mostly useless widgets was one of the few good things KDE 4 did.