Wil Gomez has a list:
We’re close to achieving a level of parity between the iPhone and a Mac that could fit in your pocket. iPhone apps are more powerful and plentiful, graphics are stunning, and anything with that much capability that can fit into a pocket, purse, or bag tells me Apple isn’t in danger of anything these days.
Good list. What Wil doesn’t want is this:
Battery Life – I suspect that iPhone 6s users worry more about battery life than we Plus users, because size matters and getting a day of heavy use from the big screen monster is simple. So, Apple, improve battery life as best you can, but don’t give me a thicker brick-like device to get there. Battery life is fine.