There is already a growing number of people who use tools like super whisper to interact with agents.
At work I'm building a "chief of staff" kind of a voice agent where you simply verbally give it tasks and it goes and gets stuff done.
Also do have a look at the latest announcements from open AI on their realtime voice
MS had great tech demos of their voice control stuff in the late 90s. Given the history I will believe this is a thing when significant numbers of people (like, hundreds of millions, not the early adopter oddball class who buy VR headsets and palmpilots and other never-quite-made-it stuff) are using voice as their primary interface with computers, and not before.