If this helps... I have the 950XL. Still waiting for the dock to arrive but tried it wireless with my ms display adapter and straight with my Sony Bravia smart tv.
Cable will always be better but my tests proved to be very usable.
Haven't tested with an external mouse or keyboard because I don't have them with Bluetooth. Using the phone to control everything needs a little getting used to but when used a bit it's ok.
Hope this helps.