My little startup has system that can stream apps to an ML processing service with both a video of what's on screen and things like the context around it and what you clicked on. We run an LLM on top of this after a bunch of other processing (OCR, delta change detection, speech reco, etc.) for our knowledge capture purposes for our single app. It would be really straight forward to make such a platform available to others to build apps like what you're showing on more then just a browser, pretty much any application you run on a desktop or working across multiple of them, we haven't since before the new GPT4 with vision, most people weren't working on anything where that would help.
Anyway, I think we've solved a bunch of the heavy lifting to make this possible, feel free to email me, or anyone else reading this who like this space, if you're a company or dev that might want that layer so you can build something cool on top of it like this (diamond@augmend.com).