Since today the rollout of Android finds 7.1.1 for the Xperia X instead. I've updated my device
Changelog from Sony can be viewed here:
http://support.sonymobile.com/global-en/xperiax/kb/8019307406466a0cf0158a88bf3b0003781/
Changes from Google Blog:
https://blog.google/products/android/sweet-update-nougat-android-711/
