I'm constantly amazed by what people consider to be significant and not significant changes.
An A5 and twice the RAM would make the so called 4S many times more powerful by every possible measure than the current model. We would be talking huge differences in performance for anything involving complex mathematics - games, Augmented Reality, Artificial Intelligence, image and sound processing. We don't yet know what this Assistant feature really means but if it really does require an A5 then we're looking at some complex AI.
This people call a 'spec bump'?
But a new case design? That's revolutionary! A new shape? Really? Huge increase in processing power with the potential to drive apps that we can't even imagine yet is a spec bump but a new shape is mana from heaven?!
Sure, I can get why some people want a bigger screen. For me that's not a big deal. I get the feeling that pretty soon after owning it you'd stop noticing the difference in screen size when looking at stuff. The fact you'd have more trouble fitting it in your pocket and reaching the far end of the screen when holding the device in one hand, however, wouldn't change.
I think Apple chose 3.5 inches for a reason and I suspect they're going to stick with it because human hands are still the same size they were when the first iPhone came out. It hasn't stopped Apple having the two best selling smartphones and the best selling PMP in the world.
I'm with you on everything you say but unfortunately it seems like hardly anyone is hearing you.