The Sony Xperia Z1 is the successor to the Xperia Z. The device was just announced today at a Sony press conference.
This device is actually very similar to the original Z, it keeps the same sort of styling but now it's made from a single piece of aluminium. The Xperia Z was original mainly made from glass and plastic. This aluminium frame will of course give it a much more rigid feel.
The screen size is still the same at 5-inches with a resolution of 1920x1080 but the device is a little larger than the original Xperia Z.
Where the Xperia Z1 really wants to compete though is on the camera side of things. This device has a 21-megapixel sensor with an aperture of f/2.0. The sensor is also quite a bit larger than most other smartphones out there such as the iPhone 5 and HTC One. It's not as big as the Nokia Lumia 1020 though.
Here is a great graph showing a sensor size comparison by TheVerge.
The device is also rocking Android 4.2.2, a large 3000mAh battery and a powerful quad-core 2.2Ghz processor.
Just like the Xperia Z the device is waterproof in up to 1.5m of water and for up to 30 minutes.
Sony want this device to be the best Android device available right now and currently they are pretty ahead of competition.
The device should be available to buy by the end of this month around the world.