The iphones general problem is that "its now a solved problem", which I mean that phones more or less do everything (and more) than anyone wants.

Having said that, figuring a way to get 2 or 3 day battery life would probably be worthwhile

Thats a great point and something I've thought about as well. Specifically if Apple released a "wallet" (or more likely integrates bitcoin into their existing wallet). We know Tim Cook owns bitcoin, so its not crazily far-fetched. I think the hurdle for them has always been regulatory. It doesn't make sense for them to enter into it until the regulatory questions are all settled.

I also recently saw this, which is interesting

Its only a matter of time before the dam breaks....