Seriously, I would like a larger phone — about the size of a Kindle or an iPad mini (without the bezels / home button). Right now I have an iPhone and a 9.7" iPad that I'm regretting purchasing. They both do almost exactly the same thing. The iPad is a second-class citizen, both for apps (no Health app, weather app etc) and for the physical camera which is always a few generations / features behind. It has a larger screen and a longer battery, and is better for reading letter-size PDFs. That's about it. It will not replace my laptop in any reasonable way. So, now I have 3 things to carry, charge and keep in sync.
The great one-handed experience of the iPhone 4 through 5s/SE isn't lost on me, but I don't spend the majority of my life hanging on to a subway pole (though it seems like it sometimes). I just want a bigger phone. I promise to only use bluetooth for calls and not to hold it up to my face like a modern-day Gordon Gekko.