The amount of Sony Yuga leaks has been quite frequent of late. The Sony Yuga (C660X) which has been reported to be a device with a 5-inch 1080p display and dust and water resistance might be called the Xperia Z according to a new report.
The Sony Yuga (C660X)
This device is expected to show up at CES 2013 which is scheduled for January and Sony might also unveil a few other devices during the event.

So far all the leaked information has not been confirmed by Sony. The device is expected to be powered by a quad-core Snapdragon S4 processor, it will run Android 4.1.1 Jelly Bean and will also feature the OptiContrast technology which helps reduce on-screen reflection.