That's a good question.
What does it offer to me in the first place? I am trying to answer this question better myself. In trying to answer this .. I tried to make a comparison with what wasn't important about it in the past. In the past, Anoncoin has offered it to me. And now, I am trying to see what was "not good enough" about it to warrant a full c++ router development.
Apart from what I don't know that it hasn't offered me .. well I would certainly enjoy the privacy afforded by what I imagine a correct system like that would offer. Privacy in the sense that my metadata won't be analyzed so freely without my ability to say either "no" or "for a price". Perhaps, I could sell access to my viewkeys . I like the idea of not being constantly bombarded with ads for things I've purchased months ago. It's creepy. But, for a price, I would consider selling that data. This is a small example.
Perhaps, I wouldn't like people to know who I conduct transactions with ... other than just that other person? Privacy doesn't have to become non-existent in this century.