I think it can work. In about what? 10 years, maybe more. Tech is simply not yet on the same page as a star trekk computer that you can talk and make it work.
And the main thing that needs to change for it to work is, that AI agents need to run locally, with your own agent without needing cloud processing. Maybe when we get into this point, is when it will make sense, from a pratical and private way.
Now what could work is making a traditional OS, but exposing ways of its power users maketheir own IA agents with the OS data, and this way choose what they want to share wth the cloud.