The Samsung Dex seems to make carrying around work files a bit more convenient. Instead of having to lug around a laptop everywhere you can just store the files on your phone and access them via the full PC experience you get with the Dex Dock. If you purchase your Galaxy S8 through T-Mobile it looks like you can get the Dex Dock for free through T-Mobile at work. Im not sure if this is available to everyone or just the business class customers. The offer in the photo is geared specifically to T-Mobile at work for business class. The offer is good through May 31.
via T-Mobile
