Speculation points to the handset arriving with the new octa-core 3.1 GHz processor, which could be the Snapdragon 810. We did hear that Sony could be giving the device as much as 4GB of RAM; this is due to the fact that the Xperia Z2 has 3GB of RAM. The display may be 5.4 inches and it could have the 2k resolution along with the White Magic LCD display.
Rumour has it that it could have a 50MP camera 7 lens, Xenon and LED flash, with a 1/1 sensor size. It may also come with an 8MP camera on the front for video chatting. The battery is thought to be in the region of around 4000mAh and this would be non-removable LiPo. The Xperia Z3 could be offered in a choice of 32GB and 64 internal memory storage and it would have the same dust and waterproofing as the Z2.
It may support SD card up to as much as 256GB, have dual band Wi-Fi and of course have all the pre-installed apps of Sony. The camera could feature low light, while picture stabilisation could be offered along with optical image stabilisation and optical video image stabilisation. The camera could support 4k video recording at 60 fps and 1080p at 120fps.