Ummm, the Surface Book -is- a windows based computer, is it not?
Or do you mean a conventional Windows desktop box that you get a separate video display for? In which case do you propose to have a touchscreen for the video display, because if not, then it won't do what the surface book does?
I'm not sure I understand your question, simple though it sounds.
a windows tablet that does everything the surface book does. from detaching to the lightness.