Sony Xperia Z should be updated to Android 4.4 KitKat by March - according to a Polish carrier

According to Play - one of Poland’s major mobile carriers - its Sony Xperia Z should be updated to Android 4.4.2 KitKat in late February, or March. If that turns out to be accurate, Xperia Z owners in other parts of the world should expect to get the new version of the OS at about the same time. The Xperia Z turned 1 year old last month, and a KitKat birthday present would be really nice.

source: BlogPlay (translated) via Xperia Blog