A few days ago, Davuluri shared his excitement about it on his official X handle. He seemed very eager to reveal what the company has in mind at the upcoming Ignite event regarding the agentic OS plans.
Unfortunately for Microsoft and Davuluri, the response has been overwhelmingly negative, so much so that the comments on that X post have now been disabled.
Made me laugh. :)
As far as I can see MS is planning the agent not to stay in the background as you described but to be an active means to control the operating system and software functions, so that many tasks can be instructed in natural language.