This is already the case. In 2019, I was startled to find that some incoming software engineers at my work didn't own a desktop or laptop... they just expected they'd use whatever computer their work provided.
Several of them don't own computers and rely entirely on smartphones for their computing needs.
It's frankly a worrying trend. Smartphones are consumer devices that do not allow the kind of automation, tinkering, scripting, and ownership that computers do.
On the flip side it means that I will be more competitive in the job market as I grow older than I was expecting.