I find it fascinating that we keep trying to build things that already exist, but on top of another app (web browser). I mean, it's cool to see, and it will have its use-cases, but I wonder where we'd be if we didn't have to do this.
FYI that if you have the right kind of Dell monitor, you can download their Display Manager software to do the same thing (and more): https://www.dell.com/en-us/lp/ddpm
I refer to this as "disposable architecture." Not that architecture doesn't matter, but that the architecture that worked yesterday doesn't necessarily need to be the architecture that works today.
Fantastic article! I went down this same rabbit hole in 2011 and built a shader for my iOS app called "Halftone." It took the CMYK route and included factors like ink bleed, paper texture, etc. It was the whole reason for the app! Yet...I received constant e-mail from users who asked "how do I remove the dots?"
Over the past year or so, I've built my own system of agents that behaves almost exactly like this. I can describe what I'd like built before I go to bed and have a fantastic foundation in place by the next day. For simpler projects, they'll be complete. Because of the reviews, the code continually improves until the agents are satisfied. I'm impressed every time.