Lenovo has released a list of Motorola Smartphones, the Android will receive 8.0 Oreo (Test). Basically, all of the current devices and those from the recent past will receive the Update. The Moto G4 is not in it any more.
Eight on the German market Motorola Smartphones to be borne in mind:
Moto Z2 Force
Moto Z2 Play
Moto Z Play
Moto G5S Plus
Moto G5 Plus
In may 2016, introduced in Moto G4 (Plus/Play) (Test) is supplied with Oreo. Yet it is also not known when the Updates will be offered. According to Motorola, the operating system is in development.