I think the gist of it / watered down version is that you would be able to compile / run a good amount / most Linux (ubuntu) applications natively-ish in Windows.

For example, I read a blog where someone pulled down the redis source, compiled it, and was running it in wsl. That would be great for me, because it means I can just run redis in my dev environment, instead of turning on a vm to run redis (I know windows ports exist, but I've found it was faster and more reliable to just run the vm).

I also typically add ports of common applications (ls, grep, touch, etc) in my windows environments just to fill the gaps windows has. With this, I probably won't need to do that anymore.