Like no seriously. The only person I've heard of using a tablet in the last 5 years for anything remotely serious is an artist using Procreate on it as their secondary art setup.
Aside from the portability, or perhaps one's preference for Procreate, I'm not sure what they're used for? I thought tablets quickly went from "new tech wonderproduct" to "it's for kids, and we make them kid proof now"?
I can think of a couple of other uses, but nothing that would require a "pro" ipad and nothing that couldn't be done on a used one.