Well .... I don't know, since I'm slightly changing my mind on the "phablet" matter.
As you can see in my signature, I have almost all the market covered : a very portable smartphone (iPhone 5S), a bigger smartphone (Lumia 925) , a small tablet (Nexus 7) and a full size tablet (iPad Air), not to speak about a small laptop and a full size one, which are off topic here.
I have different needs for every device, but I'm start thinking that maybe two of them could be integrated into the same device, if it is well designed.
I had the opportunity to play a little bit with a Lumia 1520, and I think it could be an acceptable compromise between a 5" phone and a compact 7-8" tablet.
I'll see the new iPhone 6 "phablet" (if it will be released , and I'm not sure yet) and I'll decide.
Surely I'm not going to miss the "little" next iPhone, 4" or 4.7", because I definitely need a portable smartphone with me when I'm going "jeans and T-shirt only"