Re: @Martin Gregorie - Or bigger still..
This is running in an optimized Hyper-V virtual machine. It's not Linux-on-Windows anymore like it was originally intended, which is just like Windows-on-Windows works. They have abandoned the Linux-on-Windows approach because in order to update anything they had to use the Windows Update channels, and they were tired of waiting. That's too bad because the Windows NT environment was designed to have these software abstractions like WoW and WoW64, even OS/2 on Windows before that was abandoned.
So, now, WSL is just another boring and lame virtual machine on a stripped-down and optimized version of Hyper-V. Oh, and there are no accelerated graphics in Hyper-V, by the way.