Users of most Google Nexus devices will soon be getting the Android 7 (Nougat) upgrade, with 250 "major" features, although that sounds a lot like marketing speak to me. I say most Nexus device as a couple of older models (including my 2013 Nexus 7 tablet *sniff*) are no longer part of the upgrade process. They will continue to get security updates, but no more version upgrades.
DailyDotPerhaps the biggest addition is the multi-window view, which allows users to run two apps side-by-side in resizable windows. A new notifications pane is also included in Android 7.0—which will offer a direct reply feature, making it possible to reply directly to notifications rather than needing to open an app.