thats going to be relative to users needs
.
i'm still using my 4S 32, and tbh it is absolutely fine for my needs which are mainly for my business. i just think it is so hard for Apple to really beat having lived through windows phones, i don't play games or watch video on it, SIRI for me was not worth the move up from the 4, never dials who i ruddy ask it to
.
My battery is getting fairly tired now so the new i6 might tempt me, and be a halfway option between keeping my ipad 2 or going for the air. just i prefer the 4 & 4s case and screen size, not overly bulky in my pocket even when fitted with a bumper, so i will be dragging my feet for some time yet
.
I wonder will Apple pull the same stunt with bringing out a 6s & then a 6C?