What are you talking about? The speed of innovation in the most important product of the worlds biggest hardware company is only going to increase. They are literally marketing the current S-update iPhone with the slogan: The only thing that's changed is everything. And now the full number update is coming to improve on everything that's not yet included into everything. With all the low-hanging fruits harvested, innovation must come in more unexpected ways. Apple is best on things others aren't even working on. Like when Touch ID became Apple Pay. With iPhone 7 we will learn what their plans are for 3D Touch beyond just peek and pop. Every new technology starts out as a gimmick and then becomes indispensable.
[doublepost=1455880364][/doublepost]Confirmation bias, is the tendency to search for, interpret, favor, and recall information in a way that confirms one's beliefs [or decisions], while giving disproportionately less consideration to alternative possibilities. It is a type of cognitive bias and a systematic error of inductive reasoning. People display this bias when they gather or remember information selectively, or when they interpret it in a biased way. The effect is stronger for emotionally charged issues [like screen sizes].
We humans couldn't make decisions and stand by them, if we wouldn't convince ourselves that our past decisions were right. Of course the new expensive thing we've just bought is (must be) superior (far superior) to the old thing we already owned. Otherwise the money would be wasted and we can not allow that. Therefore: "After using X for a few months, I don't think I can go back to Y." doesn't really mean much. Wait until after you've typed on (and bought) an iPad Air 3 with Smart Keyboard.