alt Hacker News> Clipboard history, but also just "oh you have these windows open while working on this task".
I feel this. When I first got to learn what a workspace was (in Eclipse, of all things), and I really drilled down into the English meaning of it (I'm Dutch), I thought about exactly what you're describing right now.
Yep.
There's also a thing of wanting "http referer"-style things but at the desktop. I want things that tell me _from where_ I clicked into a page in the browser (like "oh you got here from Slack (at this spot)"
Desktop history, clipboard history... all associated to certain contexts. Would be quite nice IMO