Failing to react to market tendencies has been an Achilles' heel of sorts for Sony in the past. Joining the dual-core and to quad-core parties late over the past two years has caused the once mighty smartphone maker to slide down in ranks and came dangerously close to the role of an also-run.It appears that the Japanese giant may have finally learned its lesson though, and this time around they are among the first to jump onto the 5" 1080p bandwagon. But the Xperia Z is more than just a pretty face - with a Snapdragon S4 Pro chipset and…