Sony Xperia Z5 series, Z3+, and Z4 Tablet are all being updated to Android 7.1.1 Nougat8
Sony has yet to formally announce this Android 7.1.1 Nougat update, but we're guessing that all owners of the Xperia models mentioned will get the new software version in the near future.
Right now, it's not clear if the Sony devices listed here will receive any other major software updates. However, we certainly hope that at least the Xperia Z5 series of smartphones will get Android O at some point.
via: Xperia Blog