Looking at some of the examples, I'm starting to see a future where people trade entirely in hashes - send some amount of bitcoins to address X, receive access to read-only access to bittorrent folder Y which is automatically populated with the latest TV episodes for a series, etc. Any idea how to apply that sort of anonymity and convenience to the real world though? Scanning QR codes with a phone seems to be the best so far, still more fiddly than cash though...
You might think you could possibly have done this in the physical world for a few years now. Don't fool yourself. You have a face and DNA. You will not be anonymous (or even pseudonymous) as long as you carry a body.
