Firmware build number 23.2.A.1.62 recently started to roll for the Xperia Z3 in a few markets. The D6603 variant saw the update roll for Vodafone Germany and Vodafone Spain, whilst the update hit the D6653 variant in Hong Kong (as well as for Singtel and Starhub in Singapore).
The same update has now been certified for the Xperia Z2 (D6502, D6503) and the Xperia Z2 Tablet (SGP521). At this stage it is unclear, whether we will see this update roll globally or not. Recently, build number 23.1.A.1.28 started to hit most of the Xperia Z2, Z3 series with a number of bug-fixing updates.