Many office workers gets some MacBook and iPhone by their employees. Do they actually need both if the employer can just hand them something like a duo which transforms to a desktop computer via usb-c cable?

Ive said for years there is nothing technical hindering an iPhone to become a something that looks like macOS when connected to large display, its just ui transformation.

But then, apple can't sell you an iPhone, an iPad and a MacBook. This is why they don't go this route I think, and this is maybe the hinder that something like the iPhone duo won't reach the full potential it could have.