You are missing the biggest announcement about the most recent generation of Windows Phones: It's called Continuum. Plug your phone into a monitor and a keyboard and mouse and you have a PC.

...Now one that runs full desktop software.

Imagine being able to carry everything you need on your phone, and hook it up to any workstation or kiosk to continue working. Less security risks, because all the data is on your device, not anyone else's PCs or networks. And while the UI might not always be the best possible, hopefully you can use it straight from the phone in a pinch as well.