Wow, that’s a pretty big boost in credibility if the terms of the deal are firm. As far as I know XB-1 is still preparing for its first test flight. So my assumption is that this deal is a commitment to buy if (and that’s a big IF), Overture actually comes into existence with adequate specs. Hopefully there’s some immediate money in the deal as well.
https://youtu.be/kraWrYS6CsE