The repo doesn't say much... I thought maybe the docs would justify "world domination" in some fashion, but they are rather dry: https://haltp.org/posts/owl.html

Is there something that describes what is notable about this Lisp dialect?

I haven't looked at it, but it's purely functional (so no destructive operations such as set!). It can't be called Scheme, because it's a subset of RnRS Scheme; that's why Racket isn't called PLT-Scheme any more. I can imagine this as a teaching tool (though the FAQ says the error messages aren't good), or perhaps usable as an extension language.

I'm going to look at it as a scripting tool that compiles to C.

I used to work for a company whose internal communication often claimed “world domination” as its ultimate goal. I just looked at revenue estimates for its market sector, this company isn't in the top 5, and is far behind the leader. Let's just leave Owl's world domination goal as aspirational.