Sony Xperia Z4 was announced in Japan yesterday and this device will be exclusive to this country, therefore Sony will announce a proper flagship smartphone later this year.
There are no details on the alleged flagship phone, but if previous rumors are to be trusted we’ll be seeing an improvement on screen resolution. Sony recently promised to focus on the user experience instead of only hardware upgrades, so we should expect improved Android OS and proprietary apps.
So the last rumors wasn’t about Sony Xperia Z4 because this is not the flagship you’ve been waiting for. Be patient and stay tuned for the end of May, when Sony will reportedly introduce its international flagship smartphone.