With Android 7.0 now officially rolling out to devices, you might wonder which non-Nexus phones will see the update some day. Sony has released a list of devices it intends to update to Nougat at some point in the not too distant future. The gist: if you've got a Sony phone from 2015 or 2016, you'll probably get the Nougat update.
The Sony devices confirmed to get Android 7.0 are as follows.
Xperia Z4 Tablet
Xperia Z5 Compact
Xperia Z5 Premium
Xperia XA Ultra
Xperia X Performance
The Z3+ is the oldest device on that list, and was released in June of 2015. The Z5 family came out a few months later, and the Xperia X just launched a few months ago. Interestingly, the Xperia Z3 isn't included, but it did have a Nougat preview build. Sony offered a developer preview build of Nougat on the X Performance as well, so hopefully the final update won't take too long. Sony does not have a timeline for the OTA, but I'd expect at least a couple months until the first devices get Nougat. The update will be staged, so some regions may get it ahead of others.