He's saying, "Hey developers that use Linux. Try doing the *the same thing* you do on Linux within the new Bash on Ubuntu on Windows project.
There is no "new BASH." There is only one BASH, and you get it from Gnu.org. What they've got is MASH (Microsoft Adulterated SHell), which is a fork of BASH. Now, maybe Microsoft can find some success with their forked project and, seriously, good luck to 'em. But, seeing as how the current state of the law is that APIs are copyrightable, many of us don't see the value of contributing to a project whose benefits will accrue only to Windows, particularly given Microsoft's malicious stance toward Open Source/Free Software over the past 20 years.