Although Google decided not to offer Nougat for most existing Nexus devices, Nexus 5 users can already load an early build of Android 7.0 released by an independent developer.
http://www.notebookcheck.net/Google-Nexus-5-gets-unofficial-Android-7-0-firmware.172262.0.html
Phone in the picture is not Nexus 5, it is actually Nexus 5X ;)