Yeah, I don't think Joss will end up as a balding sad man. He didn't become a geek icon over night. He was a TV and movie writer for about 10 years before Buffy. He's built his career over 25 years to where it is now. So he's not one hit wonder materiel. He is a great writer and director, but he's not genius all the time. And I say this as someone who probably could join the cult of Joss. His conception, in my opinion, is out matched by just about anyone, since the messages he puts in his work only become more relevant to be as I grow up. His execution does not always match up however, and then you get things like the AR. Although, who was actually to blame for that?
But where is his career now? The fact is, he is only a geek icon. Which is why I think he's so overrated. If he was the genius that he's claimed to be surely he'd be known by people who aren't Buffy/AtS/Firefly fans. He isn't well known for his 25 year career. In fact the only friend of mine who did know who he was said 'isn't he the guy that has had every one of his shows fail?' So, I'm not sure Sco's future description is completely unlikely.