I don't think it an either / or. The current AI models, as they are, improve productivity quite a bit. They're just super expensive but the expense is being subsidized so it appears reasonable.
An alternative possibility is that the models become much cheaper and their use becomes more ubiquitous which would be helpful.
I think you're vastly underestimating the technical illiteracy most people have with computers.
99% of people buy a desktop and don't even consider what the operating system is let alone think about changing it to something else. I would imagine they don't even know that a difference exists between operating systems.
I think people don't speak at their phones simply because the experience is so horrible.
I would LOVE to be able to voice control the various aspects of my phone but it's so mind numbingly frustrating that I'm annoyed just thinking about it. If it was better I would sacrifice other features for it.