What's the use case for this? It's pretty cool in any case, but I'm struggling to think of an application outside embedded or malware (which is quite advantageous to write in Go).
I mostly thought it would be a cool party trick: bundle your site into your web server and now you have a whole website with no dependencies including file system!
But then recently FrankenPHP came on the scene and now you can bundle your entire PHP app into the server that also includes the PHP runtime in a static binary and you have a totally portable, dependency-free, high performing web app. Your devops just got a lot easier with no external dependencies and easy deployments!