Sony's flagship for next year, the C660X Xperia Yuga, is bound to get a more market-friendly name before launch and rumor has it that it will be Xperia Z. The phone will also have IP certification for dust and water resistance and a low-reflectivity screen.
The Sony Xperia Z is set to receive IP57 certification for dust and water resistance, similar to the upcoming Xperia V or the HTC J Butterfly. Despite this however, the smartphone will have a pretty compact slim body measuring 139 x 71 x 7.9mm. There's no info on the weight yet, though.
One of the key features of the Sony Xperia Z will be the 5" 1080p screen. It will reportedly use Sony's OptiContrast technology (Xperia V and Xperia Tablet S use the same tech). Sony mostly uses it on TV's to reduce glare.
The official announcement of the Sony C660X Xperia Z won't happen this year but it may come as early as the second week of 2013 at CES.