With the specs of the Lumia 950XL running the full version of WIN 10 and having both my ultra fast PC that I built also with the best of hardware and my laptop it would be my ultimate goal to have all three of my devices running WIN 10 and all synchronized to be one big Win 10 happy family.
950 changed my thoughts about it when I had time playing around with it and the experience was fantastic, it's a great device as well as good design to me in my opinion (not as bad/ugly as what people described it).