Even though the new Sony's new flagship, the Xperia Z, that recently made waves at CES, will come out of the box with Android 4.1/Jelly Bean, it seems that Sony has already worked out the kinks to bring Android 4.2 to the device. According to their latest statement, Sony plans to release Android 4.2 for the device shortly after launch. Here's a quote from them,

"Xperia Z launches on JB 4.1, but will receive 4.2 shortly after launch. As always, we’ll share more info on this over the coming weeks on the blog."
Although "shortly after launch" is still a little vague, it's still appreciated to see that Sony is planning to launch it ASAP. As has been the new standard from the company over the last year, they are continuing to prove they intend to support the Android ecosystem and developers with regular and fast updates.

Source: AndroidCentral