The Samsung Galaxy S8 can exclusively take advantage of the Samsung DeX desktop PC experience when docked through the USB Type-C port of the Samsung DeX Station. By using DisplayPort over Type-C, the DeX Station allows the Galaxy S8 to connect to an external display monitor and open multiple applications from the phone onto the monitor in separate large sized windows with the DeX mode.
To try the DeX Station with an external display, we use the Hisense 50H7C 50 Smart 4K Ultra HD Ultra Smooth Motion 120 LED UHDTV. After plugging in the DeX Station to its USB Type-C based AC adapter, we attach the Hisense 50H7C monitor using a HDMI cable to the DeX Station. Upon inserting the Galaxy S8, the DeX Station converts the DisplayPort signal coming out of the Galaxy S8's USB Type-C port into HDMI which is then transmitted to the monitor through the HDMI cable.
If you choose 'Start Samsung DeX' on the Galaxy S8, you should be able to switch between different Windows on the Hisense 50H7C monitor just like a Microsoft Windows or Google Chrome environment. However DeX doesn't really allow you to change the external display resolution or check to see what types of external USB or display peripherals are attached.
While DeX generally works fine when watching YouTube or working with documents, we find that it won't adjust the size of Google Sheets to fit properly in each of its window.
Still compared to using a wireless technology like Miracast, DisplayPort over USB Type-C will allow you a smoother and better user experience watching movies and playing games without the lag or pixelation that comes with Miracast. Although you can only expect FHD (1920 x 1080) resolutions supported by the DeX Station with the Hisense 50H7C monitor, you would still get to enjoy playing fast action video from your phone.