What unique business models has Bitcoin enabled? Are there specific, unique business models that have been made possible by the invention of Bitcoin?  And if so, what are they?

Edit:

I seem to be getting a lot of answers about the areas of industry that people hope and or predict Bitcoin will be great for.  That's all well and good, but it's not what I'm asking in this question.  What I'm curious to find are specific, unique-to-Bitcoin business models that did not and could not have existed before.  David Schwartz suggest there may be none (and he may be right), in which case there shouldn't be any answers here.  Please don't upvote answers which don't answer this question!

As a simple clarifying analogy, consider this question asked of the internet.  We can answer with things like "Pay per click advertising", MMO gaming, etc. because these things are specific, unique compared to anything that came before, and only possible due to the internet.  True, these have become entire industries, but they are industries that didn't exist in any form before the internet.  All I'm wondering is if anyone knows of any comparable things for Bitcoin.  I don't know of any, and I'm a fairly Bitcoin-aware guy.  That's why I asked.  Hopefully this clarifies the question.
The only thing I can think of is Mike Hearn's idea for Smart Property. This would allow the ownership of physical assets to be digitally exchanged and stored in the block chain. Other than that, I think Bitcoin mainly improves the efficiency of many, mainly digital, business models.