Speaking of inductive charging, I think the killer app for that would be for the batteries themselves to have inductive charging coils in them. I don't know how much electronics is required to support that — if it's a lot, that may make this unfeasible — but having it built directly into the power system instead of it being a feature of the phone would be awesome. That said, if a single standard becomes popular, that would work just as well. It would just be neat if it were an addon that could be swapped in with a new battery. (Well, ignoring the waste that might incur.)