The Sony Xperia series has been promised an update for Lollipop, and there is word that the Z4 will soon be announced, possibly as early as CES 2015 (January), or even Mobile World Congress (March 2015).  There has been many rumors as far was what it will have, and this concerns the Xperia Z4 smartphone, the larger Z4 Ultra, the smaller Z4 compact, and even a possible Z4 Tablet.