I think because of the design of bitcoin $0.04 transactions are something they want to actively discourage. From what I understand of Bitcoin, the future will hold only large-scale transactions like this one, and as little sub-dollar transactions as possible. (because the network load of the system scales with the transaction quantity)
This, along with regulatory challenges, has hinted to me for at least a few years now that if bitcoin has any long term future at all, it will be as an exchange currency.
Its destiny is cryptogold where the store of value is in the security of sha256. In the future they will probably adopt new cryptography standards into the protocol as current encryption standards are broken down (ie, sha1 was used at first but you should not use it anymore due to its growing leakiness).
