Talk: Cats and dogs living together, Linux binaries running on Windows 10—How? Why? WHAT?

In Windows 10 Anniversary Update, Microsoft released an early beta of Bash on Ubuntu on Windows which allows unmodified ELF-64 Linux binaries to run natively on the new Windows Subsystem for Linux (WSL).

In Windows 10 Creators Update, Bash/WSL turned from being an interesting tech preview into a real, usable, daily-driver Linux compatible environment supporting the majority of mainstream developer tools.

Not content with this, though, the Bash/WSL teams continue to plow forward, further improving compatibility, adding features, etc.

But what IS Bash/WSL? (Magic).
Is it magic? (yes!).
How does it work? (we already covered that - magic!)
Why did Microsoft built it? (We like magic)
What can it do and why should you care? (Attend and find out :)