Unveiled at this year's CES Sony's newest entrant in the smartphone wars won plaudits for its looks and spec, putting it firmly in the same league as Apple's Iphone 5 and Samsung's Galaxy S3 . And a welcome sign that the electronics giant is finally back on track after several bad years. In terms of raw processing speed, screen size, camera and video capabilities the Xperia Z comfortably out-performs the competition. And the blending of the technologies in the Z echo Sony's tablet strapline from last year; All our innovations folded into one. In the Xperia Z Sony's engineering know-how leverages Bravia TV, Walkman audio and VAIO mobile computing expertise to deliver a hardy, high-performance smartphone. But perhaps the most interesting aspect of the Z's proposition is what Sony's done differently from the competition. Smartphones are all about everyday use so having a device that's water and scratch resistant makes perfect sense (and like al...