Xperia X to get Android 7.1.2 Concept update without the fingerprint issues that plagued the Pixel
A drawback to the update is that the setup wizard for the initial setup (or after performing 'factory reset' and 'add user' functions) after powering the phone will only work with Wi-Fi. It's not very likely you will be impacted by this in any major way.
The concept update is ready for release and is going to be published soon. The Xperia X Concept program is only available to Sony's European users for some reason. You can read more about the Xperia X here.