Not really; not without understanding what am I missing. Why does Linux need a "multiplexer for all work," while Windows either already has one, doesn't need one, or couldn't use one?
A multiplexer's job is to do the whole multiple tabs/panes/windows thing independently of the terminal itself, but (a) the UX for eg. tmux is so much worse than that of a good terminal UI, and (b) you only need that if you plan on connecting remotely (see my other comment https://news.ycombinator.com/item?id=49108483).