Augmented Reality contact lenses are the modern equivalent of 1950s predictions of nuclear-powered flying cars.
I don't think smartphones will really be replaced for forty years or more. It sounds like a long time but it really isn't. We've not come that far since the original iPhone. And that itself wasn't that much of a leap from various form factors five to ten years earlier - just a lot slicker in terms of UI. So phones will just get better. One can easily imagine the battery tech improving, perhaps practical rollable or foldable screens, lighter weight, etc. Fundamentally one wants something that easily fits in a pocket (current modern flagship phones are too large), provides a good display for interactive content and allows silent text and voice input.
I think cars, phones, tablets, laptops, desktop computers and TVs will all converge more in terms of control interfaces. There's plenty of evidence of this already with Android Auto in things like the new Polestar 2, the decline of custom TV software in favour of Android/Amazon's FireTV OS, etc. That's felt around the corner for years now, but feels like it might finally happen soon.
Evolution not revolution, in other words.