It's an art thing - if I can replace my sketchbook and phone with one device, I will. And a 6" phone would be a great size for drawing on.
Why not get a nexus 7 or ad mini then. Why compromise so much, do you really want to be holding a 6 inch device constantly let alone calling with it. Also I was referring to the 400 ppi and quad core statement because anything over 300 ppi won't make a difference atleast not a visible one without a microscope. ~300 is the most someone's eye can see. And yeah.... The s3 and most phones are quad core.... iPhone5 is faster than all of them in benchmarks and real life usage.