The XZs was a stopgap measure, the Xperia XZ1 is Sony's actual next-gen maistream flagship. It will be smaller than the XZ Premium (a 5.2" screen is expected), but will share the Snapdragon 835 chipset, awesome camera and squarish design. The latter you can see in these photos, which show the rear panel of the XZ1. They are metal, of course, and once all the seals are in, they should be waterproof too - the things we expect from Xperia flagships. But what's with the extra large flash hole? It's bigger than the one on the XZ Premium. Perhaps the Xperia XZ1 will have additional focus...
Source: http://www.gsmarena.com/sony_xperia_xz1_rear_panels_show_extra_large_hole_for_the_flash-news-26762.php
