You might not need anything else if you only do some presentation work, data display or write some mails.

It also shines for people that like to write non-digitally. Awesome to draw a quick sketch. But for anything else? Not really a working device. It seems to convince management because Apple is shiny.

This isn't some topic about thinking differently, this is a topic of being restricted, which frankly iOS (before rebranding) simply does to you. Maybe you can map all your workflows to some iOS tool, but I assure you that a notebook is still more powerful. The two monitors might indeed be an advantage though and I hate any form of hoteling and luckily don't do that too often.