Kinda crazy how a 4 year old design can still be in demand. I'd definitely like to see Apple modify the design of the next 4 inch iPhone though...if they do choose to make one.
I dunno. It's a phone. Why fix what's not broken. I kept saying that until my 4S was practically crawling to the job, then got a 5C --which I did like although it was too big for convenience-- and after that I refused to get another smartphone until the SE showed up. I was in the camp ready to go back to a dumb phone figuring I could get by with a mini iPad if they never brought out another 4" smartphone.
Not to derail the thread (and it's not a derailment, since it's relevant to demand for new gear): Corporations in tech as well as other fields are going to have to get used to a new regime pretty soon. The focus of shareholders on double-digit profit increases has already cut from fat through muscle into bone, so unless consumers across all categories can be persuaded to pay more for less (while making less money and owing more for college), a reckoning is coming down the road. More and more of the youngest addicts to the coolest and latest in tech are now struggling with no-job or low-pay jobs and college debt. The appeal of the latest anything (fashion, phones, cars) changes when one is already looking at making choices between paying the utility bill and going to the grocery store. In fact such things don't even cross one's mind when one's in a situation like that.
That said, I love my SE. If they stick with a 4" model in future, I'll be there to scarf the next one up... To me, since form should follow function, the point of redesign should never just be cosmetic. If they jack up what's under the hood and keep the same form factor, I'm good with it.