This is pretty neat:

https://tech.slashdot.org/story/18/03/06/1334255/kali-linux-for-wsl-now-available-in-the-windows-store

However, I have a couple concerns. First, how useful will it be? Currently on a Windows 10 system, I have WSL setup and nmap is essentially useless:

tester@Win10virtual:~$ sudo nmap -sP -n -T4 192.168.1.254

Starting Nmap 7.01 ( https://nmap.org ) at 2018-03-06 14:10 STD
dnet: Failed to open device eth0
QUITTING!

There is discussion about this issue here:

https://github.com/Microsoft/WSL/issues/1349

There is discussion of other network tools having socket related issues.

Second, how will AV handle tools like metasploit, powersploit, social engineering toolkit and the like that may set off AV engines?

I honestly think WSL is awesome but at this point I would recommend running whatever Linux distro of your desire on VirtualBox or the like.