Sony's Jun Katsunuma on the inspiration for Xperia Z Ultra's design
 

After the Xperia Z Ultra's launch event in both London and Shanghai, we had a brief chance to talk to Sony's Product Design Director, Jun Katsunuma, who was present in the latter city. Jun's been responsible for Sony's mobile devices since the Xperia S days, so the transition to the Xperia Z's double-glass design was also under his watch. That said, the newer Xperia Z Ultra isn't simply just an enlarged version of its smaller sibling, as we found out straight from the horse's mouth.

http://www.engadget.com/2013/06/25/s... ign=Engadget