This one's been on my Netflix queue for a while but I've not seen it. I'll have to bump it to the top.
The aspect that intrigues me is the notion of being successful and not knowing it.
Thomas Edison said something to the effect that most failures are people who just didn't realize how close to success they were when they gave up.
I was reading about some past-their-peak band who'd posted a free song download online, and then only by examining the download stats discovering that they were hugely popular in Indonesia. They'd never toured there, so they set up a gig, sold out the house and made the 6:00 news.