I love the idea of a dock.
The current surface pro 4 dock I use is crap to put it politely, it just isnt a dock and is horrendously overpriced:
also it also bemused me as to why the dock has a lock connector on it even though it doesn't have 2 so you cant actually lock your device to it and then lock the device to a desk!
I love the idea of a tablet style dock like the upcoming Nintendo Switch!
But maybe have the front come down a little so you could use the screen if you wanted? Not sure how many people would still want to do that as I do both. At work I use my surface screen and another monitor. At home if I could dock it and use it on the TV or on my monitors upstairs I wouldnt use the screen on the surface just for space.