A nice overview! I tried moving to W10 w/ WSL last August, and for the most part it was great, but the then lack of what I'd call "decent" terminal emulators was the deal breaker for me back then. Things might be better now.

I want the following "features" from a terminal emulator:

   * Tab support
   * Support for more demanding applications (like tmux and other curses based applications)
   * Sensible defaults
   * Reasonably clean UI
   * Open Source

I refuse to run an electron app as a terminal emulator. It might suit others, but it's really not for me. I have concerns over battery life, memory usage, performance and security.

Going through Łukasz's suggestions:

    * Hyper -- Not tried this, but: electron based, non-starter. 
    * Babun -- Not tried this, but: no tab support.
    * Cmder -- Tried this, No tab support, I found it a little glitchy under tmux.
    * ConEmu -- Tried this, support tabs... but I found that a lot of configuration was required, the UI (at least of the the box) was cluttered, and also found it to be glitchy under tmux.
    * MobaXterm -- Closed source, cluttered UI (for my needs).

Maybe I'm too picky.

I hadn't tried running a Linux native terminal under WSL, but will give it a go soon -- I hope it doesn't make everything ugly!