That doesn't make sense. So you don't see yourself using "reader" function because the screen is too small, yet the purpose of the reader function is to make it easier to read on a smaller screen. You're less likely to use a reader function on a larger screen, not the other way around.
You could make a book that was one inch on each side and use a font that was so large there were no more than five words per page but what would that prove!
The larger phones are gaining because they are better at these things and with the newer ones upping the resolution ... well the writing's on the wall so to speak.
Look, I've owned two iPhones and one Android so I'm by no means an Android fanboy. There is still a lot to like about the quality of the iPhone hardware and iOS AND there are a good many issues within the Android ecosystem, but Apple, and many of there fans (I'll leave out the boy part) think the current iPhone package is and always was perfect so there is and never will be a need to change what's perfect.
The two "biggest" problems Apple has going forward in the smart phone world is the lock into smaller devices and the absolute prohibition of anything other than the finger as the mechanical interface. I've mentioned the Note but will confess that it maybe too big for many, however, the screen size and resolution will make doing ANY long period activity more enjoyable, particularly with my 55 year old eyes.
I have long argued that there needs to be a better user input device for smart phones and, once again I refer to the Note and its inclusion of a pressure sensitive stylus. Jobs famously remarked something to the effect that if you see a phone with a stylus you know the maker screwed up, but all that means is that Apple is unlikely to provide for one in the foreseeable future. With larger phones with higher resolution screens and faster processors we are at the point when AutoDesk can actually offer a phone version of AutoCAD that's actually useful. Selecting entities with your finger will not do the trick but using a stylus just might!
Brian