I don't want to start any flame wars but I happen to do a lot of pair programming sessions with people (I'm a freelance dev) and a number of people have said they were jealous of my set up and are thinking about a Windows laptop for their next upgrade. Not because my set up is special or super cool, it's just their Mac set up is all sorts of broken and buggy. I can hear legit sadness in their voice.
You don't need MS to bundle an Xserver by the way. Just download VcXsrv for free https://sourceforge.net/projects/vcxsrv/ and be up and running in a few minutes. I use it mainly for flawless zero configuration clipboard sharing between Linux apps running in WSL to work with my Windows clipboard, but graphical apps run ok too (I even tried running i3 through it which was usable but too limiting with multiple monitors).
I guess I just wanted to really say that Linux based / Docker development on Windows is very much possible even today on the stable version of Windows 10, and WSL v2 is just going to make it a lot better than it already is.
I haven't been this excited over a new OS / OS feature since Windows 7 was first released.
Only problem is the June release is for insiders, not stable, and insiders requires sharing A LOT of private info with Microsoft (unacceptable IMO). It might not be until October 2019 or even April 2020 before this hits the stable channel of Windows 10. Doh.