It really isn't. And dropping 1.5k on a .com isn't either in my opinion. Web application markets are evolving, people will look for a product name, not a url system that's not even relevant to a user, unless it is for browsing files.
One major caveat: word of mouth will lose the extension in translation. People still assume .com first if they can't think of anything else. Scale up, and that's a sizable portion of lost users.
That is a good point. It's tough though, I agree that in the future, the URL system might not be as important. However, right now that transition hasn't been made.
