In particular, I would love to be able to install 3rd party app stores and software w/o having to resort to jailbreaks or weird certificate hacks.
To me, it seems obvious this would be a net win for society.
(I think you could make the argument that the iPhone is one of the most important creative mediums of our time; from that perspective, it's outrageous that it is censored by an unacountable, prude (& often Kafkaesqe) bureaucracy. Imagine if artists had to get each painting approved by the company that manufactured their oil paints? It's absurd.)