The whole idea of location being tied to the language, date formats and measurement units for software UI will makes less and less sense as time goes on.
It already makes absolutely no sense for many of us.
I think if someone downstairs asked me how far away the airport was and I answered in Kilometers or Vests they would be a bit annoyed.
It would be cool if everyone used SI units but they grow up with local tradition.
Even if you could convince everyone to move there are lots of locale features that don't really have an international standard most people know about. ISO doesn't even have a suggestion for which radix you should use and says both the American and British radix is fine (which is bad since they're mutually incompatible the way they're commonly used.)
It already makes absolutely no sense for many of us.